{"transactions":[{"id":807705,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Unit","published_at":"2026-04-17T01:53:41.000Z","date":"2026-04-15","kind":"grant","planned":false,"acquired":true,"shares":69808,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the 2nd Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the 2nd Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the 2nd Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"These RSUs vest ratably on March 31, 2027, March 31, 2028, and March 31, 2029, subject to the executive officer's continued service through each applicable vesting date.  subject in each case subject to Participant's continued Service through the applicable vesting date, and shall vest in full subject to Participant's continued Service through to the date of a Change in Control, and otherwise in accordance with the terms of the Plan and this Agreement."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the 2nd Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"These RSUs vest ratably on March 31, 2027, March 31, 2028, and March 31, 2029, subject to the executive officer's continued service through each applicable vesting date.  subject in each case subject to Participant's continued Service through the applicable vesting date, and shall vest in full subject to Participant's continued Service through to the date of a Change in Control, and otherwise in accordance with the terms of the Plan and this Agreement."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the 2nd Amended and Restated 2008 RSU Plan."}],"balance_after":174886,"derivative":{"underlying":"Common Stock","underlying_shares":69808},"source":{"system":"sec-edgar","filing":"0001424577-26-000005","document":"form4-04172026_010437.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457726000005/form4-04172026_010437.xml","form_type":"4"}},{"id":821745,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Unit","published_at":"2026-04-03T01:52:05.000Z","date":"2026-03-31","kind":"exercise","planned":false,"acquired":false,"shares":105079,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":105078,"derivative":{"underlying":"Common Stock","underlying_shares":105079},"source":{"system":"sec-edgar","filing":"0001424577-26-000002","document":"form4-04032026_010402.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457726000002/form4-04032026_010402.xml","form_type":"4"}},{"id":821744,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-04-03T01:52:05.000Z","date":"2025-03-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":45972,"price":16.28,"value":748424.16,"ownership":{"direct":true},"balance_after":1146495,"source":{"system":"sec-edgar","filing":"0001424577-26-000002","document":"form4-04032026_010402.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457726000002/form4-04032026_010402.xml","form_type":"4"}},{"id":821743,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-04-03T01:52:05.000Z","date":"2025-03-31","kind":"exercise","planned":false,"acquired":true,"shares":105079,"price":16.28,"value":1710686.12,"ownership":{"direct":true},"balance_after":1192467,"source":{"system":"sec-edgar","filing":"0001424577-26-000002","document":"form4-04032026_010402.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457726000002/form4-04032026_010402.xml","form_type":"4"}},{"id":1173680,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-04-11T22:54:40.000Z","date":"2025-03-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":55849,"price":12.28,"value":685825.72,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This amendment is being filed to address a revision in the number of shares withheld from 53032 to 55849 for payment of tax liability incident to the vesting of Restricted Stock Units."}],"balance_after":1087388,"source":{"system":"sec-edgar","filing":"0001415889-25-010597","document":"form4a-04112025_100435.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000141588925010597/form4a-04112025_100435.xml","form_type":"4/A","original_submission_date":"2025-04-02"}},{"id":1185338,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"RSU","published_at":"2025-04-02T23:43:19.000Z","date":"2025-03-31","kind":"exercise","planned":false,"acquired":false,"shares":105079,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"shares","element":"transactionShares","label":"F4","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F4","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Each Restricted Stock Unit awarded on September 6, 2024, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":210157,"derivative":{"underlying":"Common Stock","underlying_shares":105079},"source":{"system":"sec-edgar","filing":"0001415889-25-009783","document":"form4-04022025_110415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/788965/000141588925009783/form4-04022025_110415.xml","form_type":"4"}},{"id":1185337,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Unit","published_at":"2025-04-02T23:43:19.000Z","date":"2025-03-31","kind":"exercise","planned":false,"acquired":false,"shares":89179,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each Restricted Stock Unit awarded on November 11, 2022, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"shares","element":"transactionShares","label":"F3","text":"Each Restricted Stock Unit awarded on November 11, 2022, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Each Restricted Stock Unit awarded on November 11, 2022, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each Restricted Stock Unit awarded on November 11, 2022, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each Restricted Stock Unit awarded on November 11, 2022, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F3","text":"Each Restricted Stock Unit awarded on November 11, 2022, represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":89179},"source":{"system":"sec-edgar","filing":"0001415889-25-009783","document":"form4-04022025_110415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/788965/000141588925009783/form4-04022025_110415.xml","form_type":"4"}},{"id":1185336,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"COMMON STOCK","published_at":"2025-04-02T23:43:19.000Z","date":"2025-03-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":53032,"price":12.28,"value":651232.96,"ownership":{"direct":true},"balance_after":1090203,"source":{"system":"sec-edgar","filing":"0001415889-25-009783","document":"form4-04022025_110415.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000141588925009783/form4-04022025_110415.xml","form_type":"4"}},{"id":1185335,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"COMMON STOCK","published_at":"2025-04-02T23:43:19.000Z","date":"2025-03-31","kind":"exercise","planned":false,"acquired":true,"shares":194258,"price":12.28,"value":2385488.24,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents Restricted Stock Units that vested on March 31, 2023. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":1143235,"source":{"system":"sec-edgar","filing":"0001415889-25-009783","document":"form4-04022025_110415.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000141588925009783/form4-04022025_110415.xml","form_type":"4"}},{"id":1413210,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2024-09-06T21:52:47.000Z","date":"2024-09-06","kind":"grant","planned":false,"acquired":true,"shares":315236,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Restricted stock units shall vest in the amount of 105,079 restricted stock units on March 31st of each of 2025 and 2026, and 105,078 restricted stock units on March 31, 2027, subject to the Covered Person's continued Service, as defined in the RSU Plan, through the applicable vesting date, and shall vest in full subject to the Covered Person's continued Service through to the date of a Change in Control, as defined in the RSU Plan, and otherwise in accordance with the terms of the RSU Plan and the applicable award agreement."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Restricted stock units shall vest in the amount of 105,079 restricted stock units on March 31st of each of 2025 and 2026, and 105,078 restricted stock units on March 31, 2027, subject to the Covered Person's continued Service, as defined in the RSU Plan, through the applicable vesting date, and shall vest in full subject to the Covered Person's continued Service through to the date of a Change in Control, as defined in the RSU Plan, and otherwise in accordance with the terms of the RSU Plan and the applicable award agreement."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":315236,"derivative":{"underlying":"Common Stock","underlying_shares":315236},"source":{"system":"sec-edgar","filing":"0001437749-24-028682","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774924028682/rdgdoc.xml","form_type":"4"}},{"id":1551765,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Restricted Stock Unit","published_at":"2024-04-03T22:09:31.000Z","date":"2024-04-01","kind":"exercise","planned":false,"acquired":false,"shares":89179,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"shares","element":"transactionShares","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":89179,"derivative":{"underlying":"Common Stock"},"source":{"system":"sec-edgar","filing":"0001437749-24-010931","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774924010931/rdgdoc.xml","form_type":"4"}},{"id":1551764,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"COMMON STOCK","published_at":"2024-04-03T22:09:31.000Z","date":"2024-04-01","kind":"tax_withholding","planned":false,"acquired":false,"shares":39016,"price":5.33,"value":207955.28,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents vested shares of common stock withheld by the Issuer to satisfy applicable payroll tax withholding."}],"balance_after":948977,"source":{"system":"sec-edgar","filing":"0001437749-24-010931","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774924010931/rdgdoc.xml","form_type":"4"}},{"id":1551763,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"COMMON STOCK","published_at":"2024-04-03T22:09:31.000Z","date":"2024-04-01","kind":"exercise","planned":false,"acquired":true,"shares":89179,"price":5.33,"value":475324.07,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents vested Restricted Stock Units. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":987993,"source":{"system":"sec-edgar","filing":"0001437749-24-010931","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774924010931/rdgdoc.xml","form_type":"4"}},{"id":1930892,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Restricted Stock Unit","published_at":"2023-04-04T21:42:12.000Z","date":"2023-03-31","kind":"exercise","planned":false,"acquired":false,"shares":89179,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"shares","element":"transactionShares","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":178358,"derivative":{"underlying":"Common Stock"},"source":{"system":"sec-edgar","filing":"0001437749-23-009349","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774923009349/rdgdoc.xml","form_type":"4"}},{"id":1930891,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"COMMON STOCK","published_at":"2023-04-04T21:42:12.000Z","date":"2023-03-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":39033,"price":9.19,"value":358713.27,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents vested shares of common stock withheld by the Issuer to satisfy applicable payroll tax withholding."}],"balance_after":898814,"source":{"system":"sec-edgar","filing":"0001437749-23-009349","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774923009349/rdgdoc.xml","form_type":"4"}},{"id":1930890,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"COMMON STOCK","published_at":"2023-04-04T21:42:12.000Z","date":"2023-03-31","kind":"exercise","planned":false,"acquired":true,"shares":89179,"price":9.19,"value":819555.01,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents Restricted Stock Units that vested on March 31, 2023. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":937847,"source":{"system":"sec-edgar","filing":"0001437749-23-009349","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774923009349/rdgdoc.xml","form_type":"4"}},{"id":2073658,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-01-03T23:02:51.000Z","date":"2022-12-29","kind":"gift","acquired":false,"shares":5040,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Owned Alexa C. Bilsland  Revocable Trust"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The reporting person disclaims beneficial ownership of such shares."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The reporting person's spouse, Alexa C. Bilsland, is trustee of the Alexa C. Bilsland Revocable Trust.  The reporting person disclaims beneficial ownership in such shares."}],"balance_after":366397,"source":{"system":"sec-edgar","filing":"0001437749-23-000204","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774923000204/rdgdoc.xml","form_type":"4"}},{"id":2073657,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"COMMON STOCK","published_at":"2023-01-03T23:02:51.000Z","date":"2022-12-29","kind":"gift","acquired":false,"shares":5040,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":848668,"source":{"system":"sec-edgar","filing":"0001437749-23-000204","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774923000204/rdgdoc.xml","form_type":"4"}},{"id":2117063,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2022-11-15T20:42:14.000Z","date":"2022-11-11","kind":"grant","acquired":true,"shares":267537,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The Restricted Stock Units shall vest in the amount of 89,179 restricted stock units on March 31st of each of 2023, 2024 and 2025, subject to the Covered Person's continued Service, as defined in the RSU Plan, through the applicable vesting date, and shall vest in full subject to the Covered Person's continued Service through to the date of a Change in Control, as defined in the RSU Plan, and otherwise in accordance with the terms of the RSU Plan and the applicable award agreement"},{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Hallador Energy Company common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The Restricted Stock Units shall vest in the amount of 89,179 restricted stock units on March 31st of each of 2023, 2024 and 2025, subject to the Covered Person's continued Service, as defined in the RSU Plan, through the applicable vesting date, and shall vest in full subject to the Covered Person's continued Service through to the date of a Change in Control, as defined in the RSU Plan, and otherwise in accordance with the terms of the RSU Plan and the applicable award agreement"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Restricted Stock Units shall vest in the amount of 89,179 restricted stock units on March 31st of each of 2023, 2024 and 2025, subject to the Covered Person's continued Service, as defined in the RSU Plan, through the applicable vesting date, and shall vest in full subject to the Covered Person's continued Service through to the date of a Change in Control, as defined in the RSU Plan, and otherwise in accordance with the terms of the RSU Plan and the applicable award agreement"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Restricted Stock Units shall vest in the amount of 89,179 restricted stock units on March 31st of each of 2023, 2024 and 2025, subject to the Covered Person's continued Service, as defined in the RSU Plan, through the applicable vesting date, and shall vest in full subject to the Covered Person's continued Service through to the date of a Change in Control, as defined in the RSU Plan, and otherwise in accordance with the terms of the RSU Plan and the applicable award agreement"},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Hallador Energy Company common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Hallador Energy Company common stock."}],"balance_after":267537,"derivative":{"underlying":"Common Stock, par value $.01","underlying_shares":267537},"source":{"system":"sec-edgar","filing":"0001437749-22-027451","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774922027451/rdgdoc.xml","form_type":"4"}},{"id":2464622,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"68750","published_at":"2021-12-21T01:53:32.000Z","date":"2021-12-16","kind":"exercise","acquired":false,"shares":68750,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":0,"derivative":{"underlying":"Common Stock, par value $.01"},"source":{"system":"sec-edgar","filing":"0001437749-21-029007","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774921029007/rdgdoc.xml","form_type":"4"}},{"id":2464621,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2021-12-21T01:53:32.000Z","date":"2021-12-16","kind":"tax_withholding","acquired":false,"shares":30181,"price":2.17,"value":65492.77,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents vested shares of common stock withheld by the Issuer to satisfy applicable payroll tax withholding."}],"balance_after":853708,"source":{"system":"sec-edgar","filing":"0001437749-21-029007","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774921029007/rdgdoc.xml","form_type":"4"}},{"id":2464620,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2021-12-21T01:53:32.000Z","date":"2021-12-16","kind":"exercise","acquired":true,"shares":68750,"price":2.17,"value":149187.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents Restricted Stock Units that vested on December 16, 2021. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":883889,"source":{"system":"sec-edgar","filing":"0001437749-21-029007","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774921029007/rdgdoc.xml","form_type":"4"}},{"id":2938740,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock  Units","published_at":"2020-12-18T20:46:46.000Z","date":"2020-12-16","kind":"exercise","acquired":false,"shares":68750,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents Restricted Stock Units that vested on December 16, 2020. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents Restricted Stock Units that vested on December 16, 2020. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents Restricted Stock Units that vested on December 16, 2020. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Represents Restricted Stock Units that vested on December 16, 2020. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":68750,"derivative":{"underlying":"Common Stock, par value $.01","underlying_shares":68750},"source":{"system":"sec-edgar","filing":"0001424577-20-000001","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457720000001/primary_doc.xml","form_type":"4"}},{"id":2938739,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01","published_at":"2020-12-18T20:46:46.000Z","date":"2020-12-16","kind":"tax_withholding","acquired":false,"shares":30236,"price":1.07,"value":32352.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents Restricted Stock Units that vested on December 16, 2020. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"shares","element":"transactionShares","label":"F2","text":"Represents vested shares of common stock withheld by the Issuer to satisfy applicable payroll tax withholding."}],"balance_after":815139,"source":{"system":"sec-edgar","filing":"0001424577-20-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457720000001/primary_doc.xml","form_type":"4"}},{"id":2938738,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock, par value $.01","published_at":"2020-12-18T20:46:46.000Z","date":"2020-12-16","kind":"exercise","acquired":true,"shares":68500,"price":1.07,"value":73295.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents Restricted Stock Units that vested on December 16, 2020. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":845375,"source":{"system":"sec-edgar","filing":"0001424577-20-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457720000001/primary_doc.xml","form_type":"4"}},{"id":3337750,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2019-12-18T22:01:40.000Z","date":"2019-12-16","kind":"exercise","acquired":false,"shares":68750,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Represents Restricted Stock Units that vested on December 16, 2019. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Represents Restricted Stock Units that vested on December 16, 2019. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents Restricted Stock Units that vested on December 16, 2019. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Represents Restricted Stock Units that vested on December 16, 2019. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F2","text":"Represents Restricted Stock Units that vested on December 16, 2019. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":137500,"derivative":{"underlying":"Common Stock, par value $.01","underlying_shares":68750},"source":{"system":"sec-edgar","filing":"0001424577-19-000001","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457719000001/primary_doc.xml","form_type":"4"}},{"id":3337749,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"common stock, par value $.01","published_at":"2019-12-18T22:01:40.000Z","date":"2019-12-16","kind":"tax_withholding","acquired":false,"shares":30236,"price":2.74,"value":82846.64,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents vested shares of common stock withheld by the Issuer to satisfy applicable payroll tax withholding."}],"balance_after":776625,"source":{"system":"sec-edgar","filing":"0001424577-19-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457719000001/primary_doc.xml","form_type":"4"}},{"id":3337748,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"common stock, par value $.01","published_at":"2019-12-18T22:01:40.000Z","date":"2019-12-16","kind":"exercise","acquired":true,"shares":68750,"price":2.74,"value":188375.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents Restricted Stock Units that vested on December 16, 2019. Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"shares","element":"transactionShares","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock. Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":806861,"source":{"system":"sec-edgar","filing":"0001424577-19-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457719000001/primary_doc.xml","form_type":"4"}},{"id":3728202,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Unit","published_at":"2018-12-19T00:28:28.000Z","date":"2018-12-14","kind":"exercise","acquired":false,"shares":68750,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Restricted Stock Units that vested on December 14, 2018.  Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01.  Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents Restricted Stock Units that vested on December 14, 2018.  Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01.  Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Hallador Energy Common Stock.  Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":206250,"derivative":{"exercise_date":"2018-12-14","expiration_date":"2018-12-14","underlying":"Common Stock","underlying_shares":68750},"source":{"system":"sec-edgar","filing":"0001424577-18-000003","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457718000003/primary_doc.xml","form_type":"4"}},{"id":3728201,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common stock","published_at":"2018-12-19T00:28:28.000Z","date":"2018-12-14","kind":"tax_withholding","acquired":false,"shares":30236,"price":5.39,"value":162972.04,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents vested shares of common stock withheld by the Issuer to satisfy applicable payroll tax withholding."}],"balance_after":738111,"source":{"system":"sec-edgar","filing":"0001424577-18-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457718000003/primary_doc.xml","form_type":"4"}},{"id":3728200,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common stock","published_at":"2018-12-19T00:28:28.000Z","date":"2018-12-14","kind":"exercise","acquired":true,"shares":68750,"price":5.39,"value":370562.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents Restricted Stock Units that vested on December 14, 2018.  Each Restricted Stock Unit represents one share of Hallador Common Stock, par value $.01.  Vested shares will be delivered to the reporting person pursuant to the terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":768347,"source":{"system":"sec-edgar","filing":"0001424577-18-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457718000003/primary_doc.xml","form_type":"4"}},{"id":4067119,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-02-13T01:45:52.000Z","date":"2018-01-02","kind":"gift","acquired":false,"shares":7140,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"ACB REVOCABLE TRUST"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Shares are owned by the Alexa Bilsland Revocable Living Trust. Alexa Bilsland is trustee of such trust and is the reporting person's\nspouse. The reporting person disclaims any beneficial ownership to such shares."}],"balance_after":371437,"source":{"system":"sec-edgar","filing":"0001424577-18-000002","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457718000002/primary_doc.xml","form_type":"4"}},{"id":4067118,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-02-13T01:45:52.000Z","date":"2018-01-02","kind":"gift","acquired":false,"shares":7140,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":699597,"source":{"system":"sec-edgar","filing":"0001424577-18-000002","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457718000002/primary_doc.xml","form_type":"4"}},{"id":4067115,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-02-13T01:25:57.000Z","date":"2017-12-19","kind":"gift","acquired":false,"shares":6600,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"balance_after":378577,"source":{"system":"sec-edgar","filing":"0001424577-18-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457718000001/primary_doc.xml","form_type":"5"}},{"id":4067114,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-02-13T01:25:57.000Z","date":"2017-12-19","kind":"gift","acquired":false,"shares":6600,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":706737,"source":{"system":"sec-edgar","filing":"0001424577-18-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457718000001/primary_doc.xml","form_type":"5"}},{"id":4127636,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Restricted Stock Unit","published_at":"2017-12-20T01:57:55.000Z","date":"2017-12-15","kind":"exercise","acquired":false,"shares":100000,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents Restricted Stock Units that vested on December 15, 2017.   Each restricted stock unit represents one share of Hallador Common Stock."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit represents a contingent right to receive one share of Hallador Energy Company common stock.   Vested shares will delivered to the reporting person pursuant to terms of the Amended and Restated 2008 RSU Plan."},{"field":"shares","element":"transactionShares","label":"F3","text":"Each restricted stock unit represents a contingent right to receive one share of Hallador Energy Company common stock.   Vested shares will delivered to the reporting person pursuant to terms of the Amended and Restated 2008 RSU Plan."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents Restricted Stock Units that vested on December 15, 2017.   Each restricted stock unit represents one share of Hallador Common Stock."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Each restricted stock unit represents a contingent right to receive one share of Hallador Energy Company common stock.   Vested shares will delivered to the reporting person pursuant to terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F3","text":"Each restricted stock unit represents a contingent right to receive one share of Hallador Energy Company common stock.   Vested shares will delivered to the reporting person pursuant to terms of the Amended and Restated 2008 RSU Plan."}],"balance_after":275000,"derivative":{"exercise_date":"2017-12-15","expiration_date":"2017-12-15","underlying":"Common Stock","underlying_shares":100000},"source":{"system":"sec-edgar","filing":"0001424577-17-000001","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457717000001/primary_doc.xml","form_type":"4"}},{"id":4127635,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"COMMON STOCK","published_at":"2017-12-20T01:57:55.000Z","date":"2017-12-15","kind":"tax_withholding","acquired":false,"shares":46430,"price":5.93,"value":275329.9,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents vested shares of common stock withheld by the Issuer to satisfy applicable payroll tax withholding."}],"balance_after":713337,"source":{"system":"sec-edgar","filing":"0001424577-17-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457717000001/primary_doc.xml","form_type":"4"}},{"id":4127634,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"COMMON STOCK","published_at":"2017-12-20T01:57:55.000Z","date":"2017-12-15","kind":"exercise","acquired":true,"shares":100000,"price":5.93,"value":593000.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents Restricted Stock Units that vested on December 15, 2017.   Each restricted stock unit represents one share of Hallador Common Stock."}],"balance_after":759767,"source":{"system":"sec-edgar","filing":"0001424577-17-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457717000001/primary_doc.xml","form_type":"4"}},{"id":4289158,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Unit","published_at":"2017-06-08T21:28:12.000Z","date":"2017-06-06","kind":"grant","acquired":true,"shares":275000,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Hallador Energy Company common stock."},{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Hallador Energy Company common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Hallador Energy Company common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The 275,000 restricted stock units, shall vest in the amount of 68,750 restricted stock units on December 16th of each of 2018, 2019, 2020 and 2021.  Vested shares will delivered to the reporting person pursuant to terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The 275,000 restricted stock units, shall vest in the amount of 68,750 restricted stock units on December 16th of each of 2018, 2019, 2020 and 2021.  Vested shares will delivered to the reporting person pursuant to terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The 275,000 restricted stock units, shall vest in the amount of 68,750 restricted stock units on December 16th of each of 2018, 2019, 2020 and 2021.  Vested shares will delivered to the reporting person pursuant to terms of the Amended and Restated 2008 RSU Plan."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F2","text":"The 275,000 restricted stock units, shall vest in the amount of 68,750 restricted stock units on December 16th of each of 2018, 2019, 2020 and 2021.  Vested shares will delivered to the reporting person pursuant to terms of the Amended and Restated 2008 RSU Plan."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"100,000 RSUs vest/lapse on December 16, 2017.  The remaining 275,000 restricted stock units, shall vest in the amount of 68,750 restricted stock units on December 16th of each of 2018, 2019, 2020 and 2021 or otherwise in accordance with the terms of the RSU Plan and the applicable award agreement."}],"balance_after":375000,"derivative":{"underlying":"Common Stock","underlying_shares":275000},"source":{"system":"sec-edgar","filing":"0000788965-17-000021","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000078896517000021/primary_doc.xml","form_type":"4"}},{"id":4314526,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2017-05-19T01:24:02.000Z","date":"2017-05-16","kind":"tax_withholding","acquired":false,"shares":104398,"price":7.74,"value":808040.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents vested shares of common stock withheld by the Issuer to satisfy applicable payroll tax withholding."}],"balance_after":659767,"source":{"system":"sec-edgar","filing":"0000788965-17-000013","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000078896517000013/primary_doc.xml","form_type":"4"}},{"id":4314525,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2017-05-19T01:24:02.000Z","date":"2017-05-16","kind":"grant","acquired":true,"shares":225000,"price":7.74,"value":1741500.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reporting person was granted restricted stock units that vested in their entirety immediately upon grant date, May 16, 2017.  Each restricted stock unit represents one share of Hallador Common Stock."}],"balance_after":764165,"source":{"system":"sec-edgar","filing":"0000788965-17-000013","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000078896517000013/primary_doc.xml","form_type":"4"}},{"id":4314524,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Unit","published_at":"2017-05-19T01:01:27.000Z","date":"2016-12-16","kind":"exercise","acquired":false,"shares":100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"RSUs originally awarded 2/1/2014, which vested 25% each year annually beginning December 16, 2014."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"RSUs originally awarded 2/1/2014, which vested 25% each year annually beginning December 16, 2014."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F4","text":"RSUs originally awarded 2/1/2014, which vested 25% each year annually beginning December 16, 2014."}],"balance_after":100000,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":100000},"source":{"system":"sec-edgar","filing":"0000788965-17-000012","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000078896517000012/primary_doc.xml","form_type":"4/A","original_submission_date":"2016-12-20"}},{"id":4314523,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2017-05-19T01:01:27.000Z","date":"2016-12-16","kind":"tax_withholding","acquired":false,"shares":46500,"price":8.74,"value":406410.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares withheld to satisfy tax withholding obligations."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"This Form 4/A corrects the total number of shares beneficially owned at December 16, 2016."}],"balance_after":539165,"source":{"system":"sec-edgar","filing":"0000788965-17-000012","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000078896517000012/primary_doc.xml","form_type":"4/A","original_submission_date":"2016-12-20"}},{"id":4314522,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2017-05-19T01:01:27.000Z","date":"2016-12-16","kind":"exercise","acquired":true,"shares":100000,"price":8.74,"value":874000.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares received from vesting of RSUs.  Each vested RSU is equal to one share of common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"This Form 4/A corrects the total number of shares beneficially owned at December 16, 2016."}],"balance_after":585665,"source":{"system":"sec-edgar","filing":"0000788965-17-000012","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000078896517000012/primary_doc.xml","form_type":"4/A","original_submission_date":"2016-12-20"}},{"id":4516142,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Restricted Stock Unit","published_at":"2016-12-21T00:41:19.000Z","date":"2016-12-16","kind":"exercise","acquired":false,"shares":100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Restricted Stock Units originally awarded 2/1/2014, which vest 25% each year annually beginning December 1, 2014."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Restricted Stock Units originally awarded 2/1/2014, which vest 25% each year annually beginning December 1, 2014."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F3","text":"Restricted Stock Units originally awarded 2/1/2014, which vest 25% each year annually beginning December 1, 2014."}],"balance_after":100000,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":100000},"source":{"system":"sec-edgar","filing":"0001424577-16-000006","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457716000006/primary_doc.xml","form_type":"4"}},{"id":4516141,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"COMMON STOCK","published_at":"2016-12-21T00:41:19.000Z","date":"2016-12-16","kind":"tax_withholding","acquired":false,"shares":46500,"price":8.74,"value":406410.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares received from vesting of Restricted Stock Units.  Each vested Restricted Stock Unit is equal to one share of common stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Shares withheld to satisfy tax withholding obligations."}],"balance_after":662751,"source":{"system":"sec-edgar","filing":"0001424577-16-000006","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457716000006/primary_doc.xml","form_type":"4"}},{"id":4516140,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"COMMON STOCK","published_at":"2016-12-21T00:41:19.000Z","date":"2016-12-16","kind":"exercise","acquired":true,"shares":100000,"price":8.74,"value":874000.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares received from vesting of Restricted Stock Units.  Each vested Restricted Stock Unit is equal to one share of common stock."}],"balance_after":709251,"source":{"system":"sec-edgar","filing":"0001424577-16-000006","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457716000006/primary_doc.xml","form_type":"4"}},{"id":4579338,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2016-10-18T01:37:01.000Z","date":"2016-04-04","kind":"purchase","acquired":true,"shares":2000,"price":4.5,"value":9000.0,"ownership":{"direct":false,"nature":"CUSTODIAL ACCOUNT FBO HENRY BILSLAND"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"This Form 4 is being amended to reflect the correct amount of shares purchased following the reported transaction and to also correct the amount of shares purchased on April 1, 2016 for the Custodial Account FBO Augustus Bilsland, which was 900 shares, not 2,000."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The reporting person is custodian of the account, but does not have any pecuniary interest in the shares that have been reported above as purchased and 0% pecuniary interest in any shares held in such custodial account. Thus, the amount of securities beneficially owned following the transactions is zero and the reporting person does not claim beneficial ownership of such shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001424577-16-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457716000005/primary_doc.xml","form_type":"4/A","original_submission_date":"2016-04-04"}},{"id":4579337,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2016-10-18T01:37:01.000Z","date":"2016-04-01","kind":"purchase","acquired":true,"shares":900,"price":4.997,"value":4497.3,"ownership":{"direct":false,"nature":"CUSTODIAL ACCOUNT FBO AUGUSTUS BILSLAND"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This Form 4 is being amended to reflect the correct amount of shares purchased following the reported transaction and to also correct the amount of shares purchased on April 1, 2016 for the Custodial Account FBO Augustus Bilsland, which was 900 shares, not 2,000."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"This Form 4 is being amended to reflect the correct amount of shares purchased following the reported transaction and to also correct the amount of shares purchased on April 1, 2016 for the Custodial Account FBO Augustus Bilsland, which was 900 shares, not 2,000."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The reporting person is custodian of the account, but does not have any pecuniary interest in the shares that have been reported above as purchased and 0% pecuniary interest in any shares held in such custodial account. Thus, the amount of securities beneficially owned following the transactions is zero and the reporting person does not claim beneficial ownership of such shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001424577-16-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457716000005/primary_doc.xml","form_type":"4/A","original_submission_date":"2016-04-04"}},{"id":4579336,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2016-10-18T01:37:01.000Z","date":"2016-04-01","kind":"purchase","acquired":true,"shares":2000,"price":4.5,"value":9000.0,"ownership":{"direct":false,"nature":"CUSTODIAL ACCOUNT FBO OLIVER BILSLAND"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"This Form 4 is being amended to reflect the correct amount of shares purchased following the reported transaction and to also correct the amount of shares purchased on April 1, 2016 for the Custodial Account FBO Augustus Bilsland, which was 900 shares, not 2,000."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The reporting person is custodian of the account, but does not have any pecuniary interest in the shares that have been reported above as purchased and 0% pecuniary interest in any shares held in such custodial account. Thus, the amount of securities beneficially owned following the transactions is zero and the reporting person does not claim beneficial ownership of such shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001424577-16-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457716000005/primary_doc.xml","form_type":"4/A","original_submission_date":"2016-04-04"}},{"id":4607250,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2016-09-09T23:40:06.000Z","date":"2016-09-09","kind":"sale","acquired":false,"shares":62356,"price":7,"value":436492.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Total amount of shares reported include 485,665 shares held in trust account."}],"balance_after":485665,"source":{"system":"sec-edgar","filing":"0001424577-16-000004","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457716000004/primary_doc.xml","form_type":"4"}},{"id":4607249,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2016-09-09T23:40:06.000Z","date":"2016-09-08","kind":"sale","acquired":false,"shares":41038,"price":7.19,"value":295063.22,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Total amount of shares reported include 485,665 shares held in trust account."}],"balance_after":548021,"source":{"system":"sec-edgar","filing":"0001424577-16-000004","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457716000004/primary_doc.xml","form_type":"4"}},{"id":4607248,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52355,"kind":"person","name":"Bilsland Brent K","position":1,"cik":"0001424577","reported_name":"Bilsland Brent K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2016-09-09T23:40:06.000Z","date":"2016-09-07","kind":"sale","acquired":false,"shares":20192,"price":7.36,"value":148613.12,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Total amount of shares reported include 485,665 shares held in trust account."}],"balance_after":589059,"source":{"system":"sec-edgar","filing":"0001424577-16-000004","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000142457716000004/primary_doc.xml","form_type":"4"}}]}