{"transactions":[{"id":745237,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-09T14:48:29.000Z","date":"2026-06-08","kind":"grant","planned":false,"acquired":true,"shares":334,"price":42.42,"value":14168.28,"ownership":{"direct":false,"nature":"Rabbi Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares acquired through reinvestment of cash dividends pursuant to the terms of the deferred compensation plan."}],"balance_after":95137,"source":{"system":"sec-edgar","filing":"0001316004-26-000004","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600426000004/primary_doc.xml","form_type":"4"}},{"id":746842,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-06-08T19:26:37.000Z","date":"2026-06-05","kind":"exercise","planned":false,"acquired":false,"shares":4456,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Not applicable. Each RSU represented the right to receive one share of the Issuer's common stack upon vesting (or upon election by the reporting person, up to 50% of the RSUIs in cash)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not applicable. Each RSU represented the right to receive one share of the Issuer's common stack upon vesting (or upon election by the reporting person, up to 50% of the RSUIs in cash)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not applicable. Each RSU represented the right to receive one share of the Issuer's common stack upon vesting (or upon election by the reporting person, up to 50% of the RSUIs in cash)."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":4456},"source":{"system":"sec-edgar","filing":"0001316004-26-000003","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600426000003/primary_doc.xml","form_type":"4"}},{"id":746841,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-08T19:26:37.000Z","date":"2026-06-05","kind":"other","planned":false,"acquired":false,"shares":2228,"price":39.87,"value":88830.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents an election by the reporting person to receive 50% of the value of the RSUs in cash."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Represents an election by the reporting person to receive 50% of the value of the RSUs in cash."}],"balance_after":197818,"source":{"system":"sec-edgar","filing":"0001316004-26-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600426000003/primary_doc.xml","form_type":"4"}},{"id":746840,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-08T19:26:37.000Z","date":"2026-06-05","kind":"grant","planned":false,"acquired":true,"shares":4456,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Not applicable. The reported shares were acquired in connection with the vesting of a restricted stock unit (RSU) award."}],"balance_after":200046,"source":{"system":"sec-edgar","filing":"0001316004-26-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600426000003/primary_doc.xml","form_type":"4"}},{"id":854510,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-09T20:18:08.000Z","date":"2026-03-06","kind":"sale","planned":true,"acquired":false,"shares":30000,"price":37.2253,"value":1116759.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $37.1538 to $37.3455 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":175432,"source":{"system":"sec-edgar","filing":"0001316004-26-000002","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600426000002/primary_doc.xml","form_type":"4"}},{"id":854509,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-09T20:18:08.000Z","date":"2026-03-05","kind":"sale","planned":true,"acquired":false,"shares":70000,"price":37.5846,"value":2630922.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $37.30 to $38.5596 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":205432,"source":{"system":"sec-edgar","filing":"0001316004-26-000002","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600426000002/primary_doc.xml","form_type":"4"}},{"id":856807,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-06T16:45:13.000Z","date":"2026-03-04","kind":"grant","planned":false,"acquired":true,"shares":336,"price":37.52,"value":12606.72,"ownership":{"direct":false,"nature":"Rabbi Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares acquired through reinvestment of cash dividends pursuant to the terms of the deferred compensation plan."}],"balance_after":114961,"source":{"system":"sec-edgar","filing":"0001316004-26-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600426000001/primary_doc.xml","form_type":"4"}},{"id":971821,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-12-12T13:39:51.000Z","date":"2025-12-11","kind":"sale","planned":false,"acquired":false,"shares":10000,"price":33.54,"value":335400.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $33.50 to $33.72 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":275432,"source":{"system":"sec-edgar","filing":"0001316004-25-000009","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000009/primary_doc.xml","form_type":"4"}},{"id":971820,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-12-12T13:39:51.000Z","date":"2025-12-10","kind":"sale","planned":false,"acquired":false,"shares":10000,"price":33.16,"value":331600.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $33.015 to $33.45 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":285432,"source":{"system":"sec-edgar","filing":"0001316004-25-000009","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000009/primary_doc.xml","form_type":"4"}},{"id":979576,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-12-05T19:23:37.000Z","date":"2025-12-03","kind":"grant","planned":false,"acquired":true,"shares":412,"price":30.5,"value":12566.0,"ownership":{"direct":false,"nature":"Rabbi Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares acquired through reinvestment of cash dividend pursuant to the terms of the deferred compensation plan."}],"balance_after":114625,"source":{"system":"sec-edgar","filing":"0001316004-25-000008","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000008/primary_doc.xml","form_type":"4"}},{"id":979574,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-12-05T15:51:15.000Z","date":"2025-12-04","kind":"sale","planned":false,"acquired":false,"shares":20000,"price":32.12,"value":642400.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $31.83 to $32.28 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":295432,"source":{"system":"sec-edgar","filing":"0001316004-25-000007","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000007/primary_doc.xml","form_type":"4"}},{"id":992965,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-11-20T21:17:48.000Z","date":"2025-11-20","kind":"sale","planned":false,"acquired":false,"shares":10000,"price":31.37,"value":313700.0,"ownership":{"direct":true},"balance_after":315432,"source":{"system":"sec-edgar","filing":"0001316004-25-000006","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000006/primary_doc.xml","form_type":"4"}},{"id":992964,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-11-20T21:17:48.000Z","date":"2025-11-19","kind":"sale","planned":false,"acquired":false,"shares":10000,"price":30.31,"value":303100.0,"ownership":{"direct":true},"balance_after":325432,"source":{"system":"sec-edgar","filing":"0001316004-25-000006","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000006/primary_doc.xml","form_type":"4"}},{"id":996544,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-11-18T21:11:04.000Z","date":"2025-11-17","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":31.0069,"value":310069.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.00 to $31.055 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote."}],"balance_after":335432,"source":{"system":"sec-edgar","filing":"0001316004-25-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000005/primary_doc.xml","form_type":"4"}},{"id":1002720,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-11-12T15:14:50.000Z","date":"2025-11-10","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":30.002,"value":300020.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $30.00 to $30.04 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote."}],"balance_after":345432,"source":{"system":"sec-edgar","filing":"0001316004-25-000004","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000004/primary_doc.xml","form_type":"4"}},{"id":1002719,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-11-12T15:14:50.000Z","date":"2025-11-10","kind":"sale","planned":true,"acquired":false,"shares":8748,"price":29.5,"value":258066.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $29.50 to $29.53 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote."}],"balance_after":355432,"source":{"system":"sec-edgar","filing":"0001316004-25-000004","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000004/primary_doc.xml","form_type":"4"}},{"id":1005173,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-11-07T21:52:32.000Z","date":"2025-11-07","kind":"sale","planned":true,"acquired":false,"shares":1252,"price":29.502,"value":36936.504,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $29.50 to $29.525 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote."}],"balance_after":364180,"source":{"system":"sec-edgar","filing":"0001316004-25-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000003/primary_doc.xml","form_type":"4"}},{"id":1005172,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-11-07T21:52:32.000Z","date":"2025-11-07","kind":"sale","planned":true,"acquired":false,"shares":9900,"price":29.0018,"value":287117.82,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $29.00 to $29.12 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote."}],"balance_after":365432,"source":{"system":"sec-edgar","filing":"0001316004-25-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000003/primary_doc.xml","form_type":"4"}},{"id":1005171,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-11-07T21:52:32.000Z","date":"2025-11-06","kind":"sale","planned":true,"acquired":false,"shares":100,"price":29,"value":2900.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."}],"balance_after":375332,"source":{"system":"sec-edgar","filing":"0001316004-25-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000131600425000003/primary_doc.xml","form_type":"4"}},{"id":1031888,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-26T19:49:17.000Z","date":"2025-09-26","kind":"sale","planned":true,"acquired":false,"shares":7915,"price":28.5011,"value":225586.2065,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.50 to $28.53 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote."}],"balance_after":375432,"source":{"system":"sec-edgar","filing":"0001084991-25-000133","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000133/primary_doc.xml","form_type":"4"}},{"id":1032531,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-25T20:29:53.000Z","date":"2025-09-25","kind":"sale","planned":true,"acquired":false,"shares":759,"price":28.5,"value":21631.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."}],"balance_after":383347,"source":{"system":"sec-edgar","filing":"0001084991-25-000132","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000132/primary_doc.xml","form_type":"4"}},{"id":1033431,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-24T20:33:38.000Z","date":"2025-09-24","kind":"sale","planned":true,"acquired":false,"shares":1326,"price":28.5,"value":37791.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."}],"balance_after":384106,"source":{"system":"sec-edgar","filing":"0001084991-25-000131","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000131/primary_doc.xml","form_type":"4"}},{"id":1033950,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-23T20:13:26.000Z","date":"2025-09-23","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":28.0148,"value":280148.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.00 to $28.18 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote."}],"balance_after":385432,"source":{"system":"sec-edgar","filing":"0001084991-25-000130","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000130/primary_doc.xml","form_type":"4"}},{"id":1033949,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-23T20:13:26.000Z","date":"2025-09-23","kind":"sale","planned":true,"acquired":false,"shares":1457,"price":27.5,"value":40067.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."}],"balance_after":395432,"source":{"system":"sec-edgar","filing":"0001084991-25-000130","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000130/primary_doc.xml","form_type":"4"}},{"id":1035807,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-19T21:49:58.000Z","date":"2025-09-19","kind":"sale","planned":true,"acquired":false,"shares":63,"price":27.5,"value":1732.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."}],"balance_after":396889,"source":{"system":"sec-edgar","filing":"0001084991-25-000129","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000129/primary_doc.xml","form_type":"4"}},{"id":1036635,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-18T20:29:17.000Z","date":"2025-09-18","kind":"sale","planned":true,"acquired":false,"shares":1638,"price":27.5006,"value":45045.9828,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported n Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $27.50 to $27.505 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":396952,"source":{"system":"sec-edgar","filing":"0001084991-25-000128","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000128/primary_doc.xml","form_type":"4"}},{"id":1038493,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-17T20:37:14.000Z","date":"2025-09-17","kind":"sale","planned":true,"acquired":false,"shares":6553,"price":27.507,"value":180253.371,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $27.50 to $27.59 inclusive. The reporting person undertakes to provide NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":398590,"source":{"system":"sec-edgar","filing":"0001084991-25-000127","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000127/primary_doc.xml","form_type":"4"}},{"id":1039745,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-16T20:42:54.000Z","date":"2025-09-16","kind":"sale","planned":true,"acquired":false,"shares":289,"price":27.5,"value":7947.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price, if applicable."}],"balance_after":405143,"source":{"system":"sec-edgar","filing":"0001084991-25-000126","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000126/primary_doc.xml","form_type":"4"}},{"id":1040896,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-09-15T18:54:31.000Z","date":"2025-09-15","kind":"exercise","planned":false,"acquired":true,"shares":2098,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not applicable. Each Restricted Stock Unit represented the right to receive one share of the Issuer's common stock upon vesting (or upon election by the reporting person, up to 50% of the RSUs in cash)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not applicable. Each Restricted Stock Unit represented the right to receive one share of the Issuer's common stock upon vesting (or upon election by the reporting person, up to 50% of the RSUs in cash)."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not applicable. Each Restricted Stock Unit represented the right to receive one share of the Issuer's common stock upon vesting (or upon election by the reporting person, up to 50% of the RSUs in cash)."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2098},"source":{"system":"sec-edgar","filing":"0001084991-25-000125","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000125/primary_doc.xml","form_type":"4"}},{"id":1040895,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-15T18:54:31.000Z","date":"2025-09-15","kind":"grant","planned":false,"acquired":true,"shares":2098,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Not applicable. The reported shares were acquired in connection with the vesting of a Restricted Stock Unit award."}],"balance_after":405432,"source":{"system":"sec-edgar","filing":"0001084991-25-000125","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000125/primary_doc.xml","form_type":"4"}},{"id":1048511,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-04T21:22:10.000Z","date":"2025-09-04","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":27.0018,"value":270018.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.00 to $27.015 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":403334,"source":{"system":"sec-edgar","filing":"0001084991-25-000123","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000123/primary_doc.xml","form_type":"4"}},{"id":1057071,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-08-25T17:52:27.000Z","date":"2025-08-08","kind":"grant","planned":false,"acquired":true,"shares":459,"price":24.78,"value":11374.02,"ownership":{"direct":false,"nature":"Rabbi Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares acquired through reinvestment of cash dividend pursuant to the terms of the deferred compensation plan."}],"balance_after":114213,"source":{"system":"sec-edgar","filing":"0001084991-25-000119","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000119/primary_doc.xml","form_type":"4"}},{"id":1058638,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-08-22T17:11:17.000Z","date":"2025-08-22","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":26.0035,"value":260035.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025"},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.00 to $26.095 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the range set forth in this footnote."}],"balance_after":413334,"source":{"system":"sec-edgar","filing":"0001084991-25-000118","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000118/primary_doc.xml","form_type":"4"}},{"id":1058637,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-08-22T17:11:17.000Z","date":"2025-08-22","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":26.5025,"value":265025.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025"},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.50 to $26.57 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":423334,"source":{"system":"sec-edgar","filing":"0001084991-25-000118","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000118/primary_doc.xml","form_type":"4"}},{"id":1118640,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-06-09T17:40:33.000Z","date":"2025-06-05","kind":"grant","planned":false,"acquired":true,"shares":4456,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Not applicable. Each Restricted Stock Unit represents the right to receive one share of the Issuer's common stock upon vesting."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable. The acquisition reflects an award of Restricted Stock Units pursuant to the Company's 2019 Equity Incentive Plan. The award vests on the first anniversary of the grant date, subject to accelerated vesting under certain circumstances."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable. The acquisition reflects an award of Restricted Stock Units pursuant to the Company's 2019 Equity Incentive Plan. The award vests on the first anniversary of the grant date, subject to accelerated vesting under certain circumstances."}],"balance_after":4456,"derivative":{"underlying":"Common Stock","underlying_shares":4456},"source":{"system":"sec-edgar","filing":"0001084991-25-000076","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000076/primary_doc.xml","form_type":"4"}},{"id":1146050,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-05-16T18:43:42.000Z","date":"2025-05-15","kind":"sale","planned":false,"acquired":false,"shares":25000,"price":24.9,"value":622500.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These shares were sold in multiple transactions at prices ranging from $24.75 to $25.21 inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":433334,"source":{"system":"sec-edgar","filing":"0001084991-25-000071","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000071/primary_doc.xml","form_type":"4"}},{"id":1298153,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-01-22T18:34:10.000Z","date":"2025-01-21","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":29.01,"value":290100.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.00 to $29.34 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":438387,"source":{"system":"sec-edgar","filing":"0001084991-25-000010","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000010/primary_doc.xml","form_type":"4"}},{"id":1298152,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-01-22T18:34:10.000Z","date":"2025-01-21","kind":"sale","planned":true,"acquired":false,"shares":9400,"price":28.569,"value":268548.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.50 to $28.90 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":448387,"source":{"system":"sec-edgar","filing":"0001084991-25-000010","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499125000010/primary_doc.xml","form_type":"4"}},{"id":1331282,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-12-16T19:30:05.000Z","date":"2024-12-12","kind":"sale","planned":false,"acquired":false,"shares":10000,"price":27.15,"value":271500.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.00 to $27.35 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":457787,"source":{"system":"sec-edgar","filing":"0001084991-24-000151","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000151/primary_doc.xml","form_type":"4"}},{"id":1351520,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-26T23:26:08.000Z","date":"2024-11-25","kind":"sale","planned":true,"acquired":false,"shares":600,"price":28.5,"value":17100.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."}],"balance_after":467787,"source":{"system":"sec-edgar","filing":"0001084991-24-000129","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000129/primary_doc.xml","form_type":"4"}},{"id":1351519,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-26T23:26:08.000Z","date":"2024-11-22","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":28,"value":280000.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.00 to $28.075 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":468387,"source":{"system":"sec-edgar","filing":"0001084991-24-000129","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000129/primary_doc.xml","form_type":"4"}},{"id":1356157,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-21T23:56:35.000Z","date":"2024-11-21","kind":"sale","planned":true,"acquired":false,"shares":38479,"price":26.892,"value":1034777.268,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.50 to $27.56, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":478387,"source":{"system":"sec-edgar","filing":"0001084991-24-000126","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000126/primary_doc.xml","form_type":"4"}},{"id":1356156,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-21T23:56:35.000Z","date":"2024-11-20","kind":"sale","planned":true,"acquired":false,"shares":1521,"price":26,"value":39546.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.00 to $26.005, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":516866,"source":{"system":"sec-edgar","filing":"0001084991-24-000126","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000126/primary_doc.xml","form_type":"4"}},{"id":1356155,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-21T23:56:35.000Z","date":"2024-11-19","kind":"sale","planned":true,"acquired":false,"shares":6516,"price":25.5,"value":166158.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.50 to $25.51, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":518387,"source":{"system":"sec-edgar","filing":"0001084991-24-000126","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000126/primary_doc.xml","form_type":"4"}},{"id":1362352,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-18T23:51:10.000Z","date":"2024-11-18","kind":"sale","planned":true,"acquired":false,"shares":3442,"price":25.511,"value":87808.862,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.50 to $25.585 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":524903,"source":{"system":"sec-edgar","filing":"0001084991-24-000125","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000125/primary_doc.xml","form_type":"4"}},{"id":1362351,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-18T23:51:10.000Z","date":"2024-11-15","kind":"sale","planned":true,"acquired":false,"shares":10042,"price":25.006,"value":251110.252,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.00 to $25.50, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":528345,"source":{"system":"sec-edgar","filing":"0001084991-24-000125","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000125/primary_doc.xml","form_type":"4"}},{"id":1367140,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-13T23:43:11.000Z","date":"2024-08-20","kind":"sale","planned":true,"acquired":false,"shares":4690,"price":22.14,"value":103836.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This amendment to Form 4 is being filed to note that the sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.  No other revisions have been made to the original filing."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.28 per share. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above."}],"balance_after":551568,"source":{"system":"sec-edgar","filing":"0001084991-24-000111","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000111/primary_doc.xml","form_type":"4/A","original_submission_date":"2024-08-22"}},{"id":1367139,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-13T23:14:48.000Z","date":"2024-11-13","kind":"sale","planned":true,"acquired":false,"shares":2191,"price":24.5,"value":53679.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."}],"balance_after":538387,"source":{"system":"sec-edgar","filing":"0001084991-24-000110","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000110/primary_doc.xml","form_type":"4"}},{"id":1367138,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-13T23:14:48.000Z","date":"2024-11-12","kind":"sale","planned":true,"acquired":false,"shares":4713,"price":24.508,"value":115506.204,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.50 to $24.59, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":540578,"source":{"system":"sec-edgar","filing":"0001084991-24-000110","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000110/primary_doc.xml","form_type":"4"}},{"id":1367137,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-11-13T23:14:48.000Z","date":"2024-11-11","kind":"sale","planned":true,"acquired":false,"shares":3096,"price":24.5003,"value":75852.9288,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.50 to $24.53, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."}],"balance_after":545291,"source":{"system":"sec-edgar","filing":"0001084991-24-000110","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000110/primary_doc.xml","form_type":"4"}},{"id":1407007,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-09-17T01:07:09.000Z","date":"2024-09-13","kind":"grant","planned":false,"acquired":true,"shares":4195,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Not applicable. Each RSU represents the right to receive one share of the Issuer's common stock upon vesting."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Not applicable. Each RSU represents the right to receive one share of the Issuer's common stock upon vesting."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Not applicable. Each RSU represents the right to receive one share of the Issuer's common stock upon vesting."}],"balance_after":4195,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":4195},"source":{"system":"sec-edgar","filing":"0001084991-24-000098","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000098/primary_doc.xml","form_type":"4"}},{"id":1421116,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-08-28T20:27:31.000Z","date":"2024-08-26","kind":"sale","planned":false,"acquired":false,"shares":3181,"price":22,"value":69982.0,"ownership":{"direct":true},"balance_after":548387,"source":{"system":"sec-edgar","filing":"0001084991-24-000097","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000097/primary_doc.xml","form_type":"4"}},{"id":1425858,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-08-22T19:13:20.000Z","date":"2024-08-20","kind":"sale","planned":false,"acquired":false,"shares":4690,"price":22.14,"value":103836.6,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.28 per share. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above."}],"balance_after":551568,"source":{"system":"sec-edgar","filing":"0001084991-24-000096","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000096/primary_doc.xml","form_type":"4"}},{"id":1466432,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-07-02T01:13:34.000Z","date":"2024-06-30","kind":"exercise","planned":false,"acquired":false,"shares":10101,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":10101},"source":{"system":"sec-edgar","filing":"0001084991-24-000081","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000081/primary_doc.xml","form_type":"4"}},{"id":1466431,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-07-02T01:13:34.000Z","date":"2024-06-30","kind":"tax_withholding","planned":false,"acquired":false,"shares":3975,"price":20.12,"value":79977.0,"ownership":{"direct":true},"balance_after":556258,"source":{"system":"sec-edgar","filing":"0001084991-24-000081","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000081/primary_doc.xml","form_type":"4"}},{"id":1466430,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-07-02T01:13:34.000Z","date":"2024-06-30","kind":"grant","planned":false,"acquired":true,"shares":10101,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Not Applicable.  Represents shares issued in connection with vesting of a Restricted Stock Unit."}],"balance_after":560233,"source":{"system":"sec-edgar","filing":"0001084991-24-000081","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499124000081/primary_doc.xml","form_type":"4"}},{"id":1837454,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CEO & President"}}],"security":"Restricted Stock Units","published_at":"2023-07-05T23:07:45.000Z","date":"2023-06-30","kind":"grant","planned":false,"acquired":true,"shares":10101,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Not applicable. Each RSU represents the right to receive one share of the Issuer's common stock upon vesting one year from the date of grant."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Not applicable. Each RSU represents the right to receive one share of the Issuer's common stock upon vesting one year from the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Not applicable. Each RSU represents the right to receive one share of the Issuer's common stock upon vesting one year from the date of grant."}],"balance_after":10101,"derivative":{"underlying":"Common Stock","underlying_shares":10101},"source":{"system":"sec-edgar","filing":"0001084991-23-000087","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499123000087/primary_doc.xml","form_type":"4"}},{"id":1837456,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CEO & President"}}],"security":"Common Stock","published_at":"2023-07-05T22:20:15.000Z","date":"2023-06-30","kind":"tax_withholding","planned":false,"acquired":false,"shares":42240,"price":9.9,"value":418176.0,"ownership":{"direct":true},"balance_after":550132,"source":{"system":"sec-edgar","filing":"0001084991-23-000086","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499123000086/primary_doc.xml","form_type":"4"}},{"id":1837455,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CEO & President"}}],"security":"Common Stock","published_at":"2023-07-05T22:20:15.000Z","date":"2023-06-30","kind":"grant","planned":false,"acquired":true,"shares":10101,"price":9.9,"value":99999.9,"ownership":{"direct":true},"balance_after":592372,"source":{"system":"sec-edgar","filing":"0001084991-23-000086","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499123000086/primary_doc.xml","form_type":"4"}},{"id":1893986,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CEO & President"}}],"security":"Common Stock","published_at":"2023-05-15T21:48:22.000Z","date":"2023-04-25","kind":"tax_withholding","planned":false,"acquired":false,"shares":23134,"price":10.41,"value":240824.94,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This amended Form 4 is being filed to report shares withheld for payment of the tax liability incurred in connection with the issuance of the shares reported in the initial Form 4 filed on April 27, 2023."}],"balance_after":582271,"source":{"system":"sec-edgar","filing":"0001084991-23-000061","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499123000061/primary_doc.xml","form_type":"4/A","original_submission_date":"2023-04-27"}},{"id":1906786,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CEO & President"}}],"security":"Restricted Stock Units","published_at":"2023-05-03T20:26:15.000Z","date":"2023-04-28","kind":"exercise","planned":false,"acquired":false,"shares":3138,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":3138},"source":{"system":"sec-edgar","filing":"0001084991-23-000049","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499123000049/primary_doc.xml","form_type":"4/A","original_submission_date":"2023-05-02"}},{"id":1906785,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CEO & President"}}],"security":"Common Stock","published_at":"2023-05-03T20:26:15.000Z","date":"2023-04-28","kind":"grant","planned":false,"acquired":true,"shares":3138,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Rabbi Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares were issued in connection with the vesting of Restricted Stock Units on a one-for-one basis and are held in a Rabbi Trust under the Company's Non-Qualified Deferred Compensation Plan."}],"balance_after":133701,"source":{"system":"sec-edgar","filing":"0001084991-23-000049","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499123000049/primary_doc.xml","form_type":"4/A","original_submission_date":"2023-05-02"}},{"id":1906784,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CEO & President"}}],"security":"Common Stock","published_at":"2023-05-03T20:26:15.000Z","date":"2023-04-28","kind":"tax_withholding","planned":false,"acquired":false,"shares":11158,"price":10.3,"value":114927.4,"ownership":{"direct":true},"balance_after":605405,"source":{"system":"sec-edgar","filing":"0001084991-23-000049","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499123000049/primary_doc.xml","form_type":"4/A","original_submission_date":"2023-05-02"}},{"id":1909031,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CEO & President"}}],"security":"Common Stock","published_at":"2023-05-02T17:17:53.000Z","date":"2023-04-28","kind":"tax_withholding","planned":false,"acquired":false,"shares":11158,"price":10.3,"value":114927.4,"ownership":{"direct":true},"balance_after":605405,"source":{"system":"sec-edgar","filing":"0001084991-23-000045","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499123000045/primary_doc.xml","form_type":"4"}},{"id":1912602,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CEO & President"}}],"security":"Common Stock","published_at":"2023-04-27T20:34:02.000Z","date":"2023-04-25","kind":"grant","planned":false,"acquired":true,"shares":58790,"price":10.41,"value":612003.9,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The acquisition reflects an award of Stock pursuant to the Company's 2019 Equity Incentive Plan, as amended, in connection with the Retirement Agreement effective May 17, 2022 between the Company and the reporting person."}],"balance_after":616563,"source":{"system":"sec-edgar","filing":"0001084991-23-000035","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499123000035/primary_doc.xml","form_type":"4"}},{"id":1942162,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CEO"}}],"security":"Common Stock","published_at":"2023-03-22T20:50:31.000Z","date":"2023-03-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":14325,"price":9.49,"value":135944.25,"ownership":{"direct":true},"balance_after":557773,"source":{"system":"sec-edgar","filing":"0001084991-23-000023","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499123000023/primary_doc.xml","form_type":"4"}},{"id":2184704,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman"}}],"security":"Common Stock","published_at":"2022-08-16T21:27:22.000Z","date":"2022-08-15","kind":"grant","acquired":true,"shares":60839,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The acquisition reflects an award of Restricted Stock, pursuant to the Company's 2019 Equity Incentive Plan, as amended. The award vests fully on June 30, 2023, subject to accelerated vesting under certain circumstances."}],"balance_after":572098,"source":{"system":"sec-edgar","filing":"0001084991-22-000104","document":"wf-form4_166068522104650.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499122000104/wf-form4_166068522104650.xml","form_type":"4"}},{"id":2239360,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-06-08T21:17:47.000Z","date":"2022-06-07","kind":"sale","acquired":false,"shares":3918,"price":15,"value":58770.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares were sold pursuant to a Rule 10b5-1 plan."}],"balance_after":511259,"source":{"system":"sec-edgar","filing":"0001084991-22-000066","document":"wf-form4_165472305146365.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499122000066/wf-form4_165472305146365.xml","form_type":"4"}},{"id":2286851,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2022-05-02T20:12:35.000Z","date":"2022-04-28","kind":"exercise","acquired":false,"shares":3137,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"date","element":"transactionDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":3138,"derivative":{"underlying":"Common Stock","underlying_shares":3137},"source":{"system":"sec-edgar","filing":"0001084991-22-000040","document":"wf-form4_165152233515753.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499122000040/wf-form4_165152233515753.xml","form_type":"4"}},{"id":2286850,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-05-02T20:12:35.000Z","date":"2022-04-28","kind":"exercise","acquired":true,"shares":3137,"ownership":{"direct":false,"nature":"Rabbi Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares were issued in connection with the vesting of Restricted Stock Units on a one-for-one basis and are held in a Rabbi Trust under the Company's Non-Qualified Deferred Compensation Plan"}],"balance_after":130563,"source":{"system":"sec-edgar","filing":"0001084991-22-000040","document":"wf-form4_165152233515753.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499122000040/wf-form4_165152233515753.xml","form_type":"4"}},{"id":2286849,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-05-02T20:12:35.000Z","date":"2022-04-28","kind":"tax_withholding","acquired":false,"shares":11112,"price":12.32,"value":136899.84,"ownership":{"direct":true},"balance_after":515177,"source":{"system":"sec-edgar","filing":"0001084991-22-000040","document":"wf-form4_165152233515753.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499122000040/wf-form4_165152233515753.xml","form_type":"4"}},{"id":2313405,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2022-03-31T21:49:58.000Z","date":"2022-03-29","kind":"exercise","acquired":false,"shares":10973,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"date","element":"transactionDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":6275,"derivative":{"underlying":"Common Stock","underlying_shares":10973},"source":{"system":"sec-edgar","filing":"0001084991-22-000019","document":"wf-form4_164876337998946.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499122000019/wf-form4_164876337998946.xml","form_type":"4"}},{"id":2313404,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-03-31T21:49:58.000Z","date":"2022-03-29","kind":"exercise","acquired":true,"shares":10973,"ownership":{"direct":false,"nature":"Rabbi Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares were issued in connection with the vesting of Restricted Stock Units on a one-for-one basis and are held in a Rabbi Trust under the Company's Non-Qualified Deferred Compensation Plan"}],"balance_after":127426,"source":{"system":"sec-edgar","filing":"0001084991-22-000019","document":"wf-form4_164876337998946.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499122000019/wf-form4_164876337998946.xml","form_type":"4"}},{"id":2313403,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-03-31T21:49:58.000Z","date":"2022-03-29","kind":"tax_withholding","acquired":false,"shares":12953,"price":11.86,"value":153622.58,"ownership":{"direct":true},"balance_after":526289,"source":{"system":"sec-edgar","filing":"0001084991-22-000019","document":"wf-form4_164876337998946.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499122000019/wf-form4_164876337998946.xml","form_type":"4"}},{"id":2322089,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2022-03-22T20:40:42.000Z","date":"2022-03-18","kind":"tax_withholding","acquired":false,"shares":14311,"price":11.14,"value":159424.54,"ownership":{"direct":true},"balance_after":539242,"source":{"system":"sec-edgar","filing":"0001084991-22-000011","document":"wf-form4_164798162184827.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499122000011/wf-form4_164798162184827.xml","form_type":"4"}},{"id":2734900,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2021-04-30T20:26:28.000Z","date":"2021-04-28","kind":"exercise","acquired":false,"shares":3138,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":17248,"derivative":{"underlying":"Common Stock","underlying_shares":3138},"source":{"system":"sec-edgar","filing":"0001084991-21-000047","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000047/primary_doc.xml","form_type":"4"}},{"id":2734899,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2021-04-30T20:26:28.000Z","date":"2021-04-28","kind":"exercise","acquired":true,"shares":3138,"ownership":{"direct":false,"nature":"By Rabbi Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares were issued in connection with the vesting of Restricted Stock Units on a one-for-one basis and are held in a Rabbi Trust under the Company's Non-Qualified Deferred Compensation Plan."}],"balance_after":116453,"source":{"system":"sec-edgar","filing":"0001084991-21-000047","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000047/primary_doc.xml","form_type":"4"}},{"id":2734898,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2021-04-30T20:26:28.000Z","date":"2021-04-28","kind":"tax_withholding","acquired":false,"shares":11112,"price":9.12,"value":101341.44,"ownership":{"direct":true},"balance_after":553553,"source":{"system":"sec-edgar","filing":"0001084991-21-000047","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000047/primary_doc.xml","form_type":"4"}},{"id":2762303,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2021-04-02T17:27:23.000Z","date":"2021-03-18","kind":"grant","acquired":true,"shares":109212,"price":8.91,"value":973078.92,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This amendment to Form 4 is being filed to correct the number of shares granted in connection with the restricted stock award referenced in the original filing, which mistakenly reported 100,626 restricted shares.  As noted in Table I, the correct number of shares granted in the award was 109,212.  In addition, column 5 of Table has been corrected to show the revised number of shares beneficially owned following the reported transaction.  There are no other revisions to the original Form 4 as filed on March 22, 2021."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"This amendment to Form 4 is being filed to correct the number of shares granted in connection with the restricted stock award referenced in the original filing, which mistakenly reported 100,626 restricted shares.  As noted in Table I, the correct number of shares granted in the award was 109,212.  In addition, column 5 of Table has been corrected to show the revised number of shares beneficially owned following the reported transaction.  There are no other revisions to the original Form 4 as filed on March 22, 2021."}],"balance_after":577619,"source":{"system":"sec-edgar","filing":"0001084991-21-000029","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000029/primary_doc.xml","form_type":"4/A","original_submission_date":"2021-03-22"}},{"id":2766994,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2021-03-31T20:48:20.000Z","date":"2021-03-29","kind":"exercise","acquired":false,"shares":10973,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"date","element":"transactionDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":20386,"derivative":{"underlying":"Common Stock","underlying_shares":10973},"source":{"system":"sec-edgar","filing":"0001084991-21-000027","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000027/primary_doc.xml","form_type":"4"}},{"id":2766993,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2021-03-31T20:48:20.000Z","date":"2021-03-29","kind":"tax_withholding","acquired":false,"shares":12954,"price":9.19,"value":119047.26,"ownership":{"direct":true},"balance_after":556079,"source":{"system":"sec-edgar","filing":"0001084991-21-000027","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000027/primary_doc.xml","form_type":"4"}},{"id":2766992,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2021-03-31T20:48:20.000Z","date":"2021-03-29","kind":"exercise","acquired":true,"shares":10973,"ownership":{"direct":false,"nature":"By Rabbi Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares were issued in connection with the vesting of Restricted Stock Units on a one-for-one basis and are held in a Rabbi Trust under the Company's Non-Qualified Deferred Compensation Plan."}],"balance_after":113315,"source":{"system":"sec-edgar","filing":"0001084991-21-000027","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000027/primary_doc.xml","form_type":"4"}},{"id":2776680,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2021-03-22T20:27:16.000Z","date":"2021-03-18","kind":"grant","acquired":true,"shares":100626,"price":8.91,"value":896577.66,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The acquisition reflects an award of Restricted Stock pursuant to the Company's 2019 Equity Incentive Plan. The award vests in one-third annual increments beginning on the first anniversary of the grant date, subject to accelerated vesting under certain circumstances."}],"balance_after":569033,"source":{"system":"sec-edgar","filing":"0001084991-21-000016","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000016/primary_doc.xml","form_type":"4"}},{"id":2783725,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2021-03-17T22:51:09.000Z","date":"2021-03-15","kind":"exercise","acquired":false,"shares":9317,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":31359,"derivative":{"underlying":"Common Stock","underlying_shares":9317},"source":{"system":"sec-edgar","filing":"0001084991-21-000009","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000009/primary_doc.xml","form_type":"4"}},{"id":2783724,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2021-03-17T22:51:09.000Z","date":"2021-03-15","kind":"tax_withholding","acquired":false,"shares":7620,"price":9.74,"value":74218.8,"ownership":{"direct":true},"balance_after":468407,"source":{"system":"sec-edgar","filing":"0001084991-21-000009","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000009/primary_doc.xml","form_type":"4"}},{"id":2783723,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2021-03-17T22:51:09.000Z","date":"2021-03-15","kind":"exercise","acquired":true,"shares":9317,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Rabbi Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares were issued in connection with the vesting of Restricted Stock Units on a one-for-one basis and are held in a Rabbi Trust under the Company's Non-Qualified Deferred Compensation Plan."}],"balance_after":102342,"source":{"system":"sec-edgar","filing":"0001084991-21-000009","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499121000009/primary_doc.xml","form_type":"4"}},{"id":3166733,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2020-04-30T20:44:02.000Z","date":"2020-04-28","kind":"grant","acquired":true,"shares":9413,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable. The acquisition reflects an award of Restricted Stock Units (\"RSU\") pursuant to the Company's 2019 Equity Incentive Plan. Each RSU represents the right to receive one share of Company common stock upon vesting.  The award vests in one-third annual increments beginning on the first anniversary of the grant date, subject to accelerated vesting under certain circumstances."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable. The acquisition reflects an award of Restricted Stock Units (\"RSU\") pursuant to the Company's 2019 Equity Incentive Plan. Each RSU represents the right to receive one share of Company common stock upon vesting.  The award vests in one-third annual increments beginning on the first anniversary of the grant date, subject to accelerated vesting under certain circumstances."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable. The acquisition reflects an award of Restricted Stock Units (\"RSU\") pursuant to the Company's 2019 Equity Incentive Plan. Each RSU represents the right to receive one share of Company common stock upon vesting.  The award vests in one-third annual increments beginning on the first anniversary of the grant date, subject to accelerated vesting under certain circumstances."}],"balance_after":40676,"derivative":{"underlying":"Common Stock","underlying_shares":9413},"source":{"system":"sec-edgar","filing":"0001084991-20-000022","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000022/primary_doc.xml","form_type":"4"}},{"id":3166732,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2020-04-30T20:44:02.000Z","date":"2020-04-28","kind":"grant","acquired":true,"shares":84720,"price":5.64,"value":477820.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The acquisition reflects an award of Restricted Stock pursuant to the Company's 2019 Equity Incentive Plan. The award vests in one-third annual increments beginning on the first anniversary of the grant date, subject to accelerated vesting under certain circumstances."}],"balance_after":476027,"source":{"system":"sec-edgar","filing":"0001084991-20-000022","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000022/primary_doc.xml","form_type":"4"}},{"id":3191294,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2020-04-01T00:53:05.000Z","date":"2020-03-29","kind":"exercise","acquired":false,"shares":10973,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable. Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":31263,"derivative":{"underlying":"Common Stock","underlying_shares":10973},"source":{"system":"sec-edgar","filing":"0001084991-20-000012","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000012/primary_doc.xml","form_type":"4"}},{"id":3191293,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2020-04-01T00:53:05.000Z","date":"2020-03-29","kind":"tax_withholding","acquired":false,"shares":13211,"price":4.75,"value":62752.25,"ownership":{"direct":true},"balance_after":391307,"source":{"system":"sec-edgar","filing":"0001084991-20-000012","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000012/primary_doc.xml","form_type":"4"}},{"id":3191292,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2020-04-01T00:53:05.000Z","date":"2020-03-29","kind":"exercise","acquired":true,"shares":10973,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Rabbi Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares were issued in connection with the vesting of Restricted Stock Units on a one-for-one basis and are held in a Rabbi Trust under the Company's Non-Qualified Deferred Compensation Plan."}],"balance_after":93025,"source":{"system":"sec-edgar","filing":"0001084991-20-000012","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000012/primary_doc.xml","form_type":"4"}},{"id":3203148,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2020-03-18T22:01:20.000Z","date":"2020-03-15","kind":"exercise","acquired":false,"shares":9317,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":42236,"derivative":{"underlying":"Common Stock","underlying_shares":9317},"source":{"system":"sec-edgar","filing":"0001084991-20-000005","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000005/primary_doc.xml","form_type":"4"}},{"id":3203147,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2020-03-18T22:01:20.000Z","date":"2020-03-15","kind":"tax_withholding","acquired":false,"shares":7663,"price":6.25,"value":47893.75,"ownership":{"direct":true},"balance_after":404248,"source":{"system":"sec-edgar","filing":"0001084991-20-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000005/primary_doc.xml","form_type":"4"}},{"id":3203146,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2020-03-18T22:01:20.000Z","date":"2020-03-15","kind":"exercise","acquired":true,"shares":9317,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Rabbi Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares were issued in connection with the vesting of Restricted Stock Units on a one-for-one basis and are held in a Rabbi Trust under the Company's Non-Qualified Deferred Compensation Plan."}],"balance_after":82052,"source":{"system":"sec-edgar","filing":"0001084991-20-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000005/primary_doc.xml","form_type":"4"}},{"id":3264462,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2020-02-20T01:34:35.000Z","date":"2020-02-14","kind":"exercise","acquired":false,"shares":21139,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":51553,"derivative":{"underlying":"Common Stock","underlying_shares":21139},"source":{"system":"sec-edgar","filing":"0001084991-20-000002","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000002/primary_doc.xml","form_type":"4"}},{"id":3264461,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2020-02-20T01:34:35.000Z","date":"2020-02-14","kind":"tax_withholding","acquired":false,"shares":1477,"price":10.62,"value":15685.74,"ownership":{"direct":true},"balance_after":411911,"source":{"system":"sec-edgar","filing":"0001084991-20-000002","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000002/primary_doc.xml","form_type":"4"}},{"id":3264460,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2020-02-20T01:34:35.000Z","date":"2020-02-14","kind":"exercise","acquired":true,"shares":21139,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Rabbi Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares were issued in connection with the vesting of Restricted Stock Units on a one-for-one basis and are held in a Rabbi Trust under the Company's Non-Qualified Deferred Compensation Plan."}],"balance_after":72735,"source":{"system":"sec-edgar","filing":"0001084991-20-000002","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000002/primary_doc.xml","form_type":"4"}},{"id":3475051,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2019-07-01T21:42:46.000Z","date":"2019-06-28","kind":"grant","acquired":true,"shares":32919,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Not Applicable.  The acquisition reflects an award of Restricted Stock Units (\"RSU\") pursuant to the Company's 2019 Equity Incentive Plan.  Each RSU represents the right to receive one share of Company common stock upon vesting."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Not Applicable.  The acquisition reflects an award of Restricted Stock Units (\"RSU\") pursuant to the Company's 2019 Equity Incentive Plan.  Each RSU represents the right to receive one share of Company common stock upon vesting."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F4","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":72692,"derivative":{"exercise_price":17.29,"underlying":"Common Stock","underlying_shares":32919},"source":{"system":"sec-edgar","filing":"0001084991-19-000045","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000045/primary_doc.xml","form_type":"4"}},{"id":3475050,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2019-07-01T21:42:46.000Z","date":"2019-06-28","kind":"grant","acquired":true,"shares":98755,"price":17.29,"value":1707473.95,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The acquisition reflects an award of Restricted Stock pursuant to the Company's 2019 Equity Incentive Plan.  The award vests in one-third annual increments beginning on the first anniversary of the grant date, subject to accelerated vesting under certain circumstances."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The amount of securities beneficially owned has been adjusted to add 557 shares of Company common stock in order to correct an inadvertent error in the number of shares withheld for tax withholding in connection with the Form 4 filed on March 19, 2019."}],"balance_after":413388,"source":{"system":"sec-edgar","filing":"0001084991-19-000045","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000045/primary_doc.xml","form_type":"4"}},{"id":3588655,"issuer":{"id":1461,"kind":"organization","name":"NATURAL GAS SERVICES GROUP INC","symbol":"NGS"},"owners":[{"id":40194,"kind":"person","name":"Taylor Stephen Charles","position":1,"cik":"0001316004","reported_name":"Taylor Stephen Charles","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Restricted Stock Units","published_at":"2019-03-19T21:04:21.000Z","date":"2019-03-15","kind":"exercise","acquired":false,"shares":9317,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Not Applicable.  Each RSU represents the right to receive one share of Company common stock upon vesting without payment."}],"balance_after":39773,"derivative":{"underlying":"Common Stock","underlying_shares":9317},"source":{"system":"sec-edgar","filing":"0001084991-19-000014","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000014/primary_doc.xml","form_type":"4"}}],"next_cursor":"2019-03-19T21:04:21.000000Z,3588655"}