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The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein."}],"balance_after":100463,"source":{"system":"sec-edgar","filing":"0001062993-24-011498","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000106299324011498/form4.xml","form_type":"4"}},{"id":1498118,"issuer":{"id":6519,"kind":"organization","name":"MAMMOTH ENERGY SERVICES, INC.","symbol":"TUSK"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-30T20:25:22.000Z","date":"2024-05-30","kind":"purchase","planned":false,"acquired":true,"shares":3000,"price":3.6481,"value":10944.3,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $3.615 per share to $3.6799 per share, inclusive. The reporting person undertakes to provide to Mammoth Energy Services, Inc. any security holder of Mammoth Energy Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote."}],"balance_after":18279,"source":{"system":"sec-edgar","filing":"0001679268-24-000028","document":"wk-form4_1717100189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000167926824000028/wk-form4_1717100189.xml","form_type":"4"}},{"id":1498117,"issuer":{"id":6519,"kind":"organization","name":"MAMMOTH ENERGY SERVICES, INC.","symbol":"TUSK"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-30T20:25:22.000Z","date":"2024-05-28","kind":"purchase","planned":false,"acquired":true,"shares":2000,"price":3.574,"value":7148.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $3.5499 per share to $3.6098 per share, inclusive. The reporting person undertakes to provide to Mammoth Energy Services, Inc. any security holder of Mammoth Energy Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote."}],"balance_after":15279,"source":{"system":"sec-edgar","filing":"0001679268-24-000028","document":"wk-form4_1717100189.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000167926824000028/wk-form4_1717100189.xml","form_type":"4"}},{"id":1514606,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2024-05-16T20:29:21.000Z","date":"2024-05-14","kind":"grant","planned":false,"acquired":true,"shares":7323,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents options granted to the reporting person for his service on the Company's Board of Directors for 2023.  This option vests as to 2,441 shares on each of 5/14/24, 5/14/25 and 5/14/26."}],"balance_after":7323,"derivative":{"exercise_price":2.14,"expiration_date":"2034-05-14","underlying":"Common Stock","underlying_shares":7323},"source":{"system":"sec-edgar","filing":"0001062993-24-010460","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000106299324010460/form4.xml","form_type":"4"}},{"id":1577028,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true}}],"security":"Common stock","published_at":"2024-03-14T20:28:20.000Z","date":"2024-03-13","kind":"other","planned":false,"acquired":true,"shares":91463,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents an in-kind distribution by Wexford Capital LP (\"Wexford Capital\") to Arthur Amron that does not involve (i) a purchase or a sale of securities or (ii) any additional consideration, in connection with his separation from service as an employee of Wexford Capital."}],"balance_after":98463,"source":{"system":"sec-edgar","filing":"0001048462-24-000011","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000104846224000011/form4.xml","form_type":"4"}},{"id":1577027,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true}}],"security":"Common stock","published_at":"2024-03-14T20:28:20.000Z","date":"2024-03-12","kind":"purchase","planned":false,"acquired":true,"shares":7000,"price":2.4471,"value":17129.7,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents a weighted average price. These shares of common stock were purchased in multiple transactions at prices ranging from $2.3899 to $2.4857, inclusive.  The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein."}],"balance_after":7000,"source":{"system":"sec-edgar","filing":"0001048462-24-000011","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000104846224000011/form4.xml","form_type":"4"}},{"id":1577026,"issuer":{"id":6519,"kind":"organization","name":"MAMMOTH ENERGY SERVICES, INC.","symbol":"TUSK"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-03-14T20:11:48.000Z","date":"2024-03-12","kind":"purchase","planned":false,"acquired":true,"shares":3000,"price":3.719,"value":11157.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $3.71 per share to $3.725 per share, inclusive. The reporting person undertakes to provide to Mammoth Energy Services, Inc. any security holder of Mammoth Energy Services, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote."}],"balance_after":13279,"source":{"system":"sec-edgar","filing":"0001679268-24-000010","document":"wk-form4_1710447093.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000167926824000010/wk-form4_1710447093.xml","form_type":"4"}},{"id":1709618,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-12-15T21:47:47.000Z","date":"2023-12-13","kind":"grant","planned":false,"acquired":true,"shares":9291,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 13, 2023, the Company granted 9,291 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of\nDirectors of the Company for 2023. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"On December 13, 2023, the Company granted 9,291 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of\nDirectors of the Company for 2023. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."}],"balance_after":9291,"source":{"system":"sec-edgar","filing":"0001062993-23-022642","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000106299323022642/form4.xml","form_type":"4"}},{"id":1862768,"issuer":{"id":6519,"kind":"organization","name":"MAMMOTH ENERGY SERVICES, INC.","symbol":"TUSK"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-06-08T21:06:15.000Z","date":"2023-06-07","kind":"grant","planned":false,"acquired":true,"shares":23810,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of June 7, 2024 and the date of the issuer's 2024 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of June 7, 2024 and the date of the issuer's 2024 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."}],"balance_after":23810,"source":{"system":"sec-edgar","filing":"0001679268-23-000042","document":"wk-form4_1686258365.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000167926823000042/wk-form4_1686258365.xml","form_type":"4"}},{"id":2059089,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2023-01-09T21:31:21.000Z","date":"2023-01-05","kind":"grant","acquired":true,"shares":7080,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On January 5, 2023, the Company granted an option to purchase 7,080 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the Company for 2022. The Option was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Option was granted to Wexford Capital LP. The Option vests as to 2,360 shares on each of 1/5/2023, 1/5/2024 and 1/5/2025."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"On January 5, 2023, the Company granted an option to purchase 7,080 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the Company for 2022. The Option was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Option was granted to Wexford Capital LP. The Option vests as to 2,360 shares on each of 1/5/2023, 1/5/2024 and 1/5/2025."}],"balance_after":7080,"derivative":{"exercise_price":1.07,"expiration_date":"2033-01-05","underlying":"Common Stock","underlying_shares":7080},"source":{"system":"sec-edgar","filing":"0001062993-23-000718","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000106299323000718/form4.xml","form_type":"4"}},{"id":2059088,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-01-09T21:31:21.000Z","date":"2023-01-05","kind":"grant","acquired":true,"shares":27613,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On January 5, 2023, the Company granted 27,613 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of\nDirectors of the Company for 2022. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The\nRestricted Stock vests 6 months following the grant date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"On January 5, 2023, the Company granted 27,613 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of\nDirectors of the Company for 2022. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The\nRestricted Stock vests 6 months following the grant date."}],"balance_after":27613,"source":{"system":"sec-edgar","filing":"0001062993-23-000718","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000106299323000718/form4.xml","form_type":"4"}},{"id":2218819,"issuer":{"id":6519,"kind":"organization","name":"MAMMOTH ENERGY SERVICES, INC.","symbol":"TUSK"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-06-30T20:12:26.000Z","date":"2022-06-29","kind":"grant","acquired":true,"shares":45662,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of June 29, 2023 and the date of the issuer's 2023 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of June 29, 2023 and the date of the issuer's 2023 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."}],"balance_after":45662,"source":{"system":"sec-edgar","filing":"0001679268-22-000029","document":"wf-form4_165661993180365.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000167926822000029/wf-form4_165661993180365.xml","form_type":"4"}},{"id":2470221,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true}}],"security":"Stock Option (Right to Buy)","published_at":"2021-12-17T02:16:22.000Z","date":"2021-12-14","kind":"grant","acquired":true,"shares":7062,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On December 14, 2021, the Company granted an option to purchase 7,062 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the\nCompany. The Option was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Option was granted to Wexford Capital LP. The Option vests as to 2,354 shares on each of 12/14/21, 12/14/22 and 12/14/23."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"On December 14, 2021, the Company granted an option to purchase 7,062 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the\nCompany. The Option was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Option was granted to Wexford Capital LP. The Option vests as to 2,354 shares on each of 12/14/21, 12/14/22 and 12/14/23."}],"balance_after":7062,"derivative":{"exercise_price":6.82,"expiration_date":"2031-12-14","underlying":"Common Stock","underlying_shares":7062},"source":{"system":"sec-edgar","filing":"0001437749-21-028833","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000143774921028833/rdgdoc.xml","form_type":"4"}},{"id":2470220,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"Amron Arthur H","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-12-17T02:16:22.000Z","date":"2021-12-14","kind":"grant","acquired":true,"shares":4582,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 14, 2021, the Company granted 4,582 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of\nDirectors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The\nRestricted Stock vests 6 months following the grant date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"On December 14, 2021, the Company granted 4,582 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of\nDirectors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The\nRestricted Stock vests 6 months following the grant date."}],"balance_after":4582,"source":{"system":"sec-edgar","filing":"0001437749-21-028833","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000143774921028833/rdgdoc.xml","form_type":"4"}},{"id":2681289,"issuer":{"id":6519,"kind":"organization","name":"MAMMOTH ENERGY SERVICES, INC.","symbol":"TUSK"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-06-04T20:50:58.000Z","date":"2021-06-02","kind":"grant","acquired":true,"shares":25641,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of June 2, 2022 and the date of the issuer's 2022 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of June 2, 2022 and the date of the issuer's 2022 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."}],"balance_after":25641,"source":{"system":"sec-edgar","filing":"0001679268-21-000033","document":"wf-form4_162283983655667.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000167926821000033/wf-form4_162283983655667.xml","form_type":"4"}},{"id":2912430,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2021-01-08T22:30:36.000Z","date":"2021-01-06","kind":"grant","acquired":true,"shares":6850,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On January 6, 2021, the Company granted an option to purchase 6,850 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the Company. The Option was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Option was granted to Wexford Capital LP. The Option vests as to 2,284 shares on 1/6/21, and as to 2,283 shares on 1/6/22 and 1/6/23."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"On January 6, 2021, the Company granted an option to purchase 6,850 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the Company. The Option was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Option was granted to Wexford Capital LP. The Option vests as to 2,284 shares on 1/6/21, and as to 2,283 shares on 1/6/22 and 1/6/23."}],"balance_after":6850,"derivative":{"exercise_price":8.06,"expiration_date":"2031-01-06","underlying":"Common Stock","underlying_shares":6850},"source":{"system":"sec-edgar","filing":"0000914190-21-000006","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000091419021000006/edgar.xml","form_type":"4"}},{"id":2912429,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-01-08T22:30:36.000Z","date":"2021-01-06","kind":"grant","acquired":true,"shares":3666,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On January 6, 2021, the Company granted 3,666 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of Directors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"On January 6, 2021, the Company granted 3,666 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of Directors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."}],"balance_after":3666,"source":{"system":"sec-edgar","filing":"0000914190-21-000006","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000091419021000006/edgar.xml","form_type":"4"}},{"id":3087655,"issuer":{"id":6519,"kind":"organization","name":"MAMMOTH ENERGY SERVICES, INC.","symbol":"TUSK"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2020-07-07T20:28:14.000Z","date":"2020-07-02","kind":"grant","acquired":true,"shares":86957,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of July 2, 2021 and the date of the issuer's 2021 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."},{"field":"shares","element":"transactionShares","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of July 2, 2021 and the date of the issuer's 2021 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of July 2, 2021 and the date of the issuer's 2021 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."}],"balance_after":86957,"source":{"system":"sec-edgar","filing":"0001048462-20-000010","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000104846220000010/form4.xml","form_type":"4"}},{"id":3337127,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2019-12-18T22:09:51.000Z","date":"2019-12-16","kind":"grant","acquired":true,"shares":5568,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On December 16, 2019, the Company granted an option to purchase 5,568 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the Company. The Option was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Option was granted to Wexford Capital LP. The Option vests as to 1,856 shares on each of 12/16/19, 12/16/20 and 12/16/21."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"On December 16, 2019, the Company granted an option to purchase 5,568 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the Company. The Option was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Option was granted to Wexford Capital LP. The Option vests as to 1,856 shares on each of 12/16/19, 12/16/20 and 12/16/21."}],"balance_after":5568,"derivative":{"exercise_price":8.57,"expiration_date":"2029-12-16","underlying":"Common Stock","underlying_shares":5568},"source":{"system":"sec-edgar","filing":"0000914190-19-000502","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000091419019000502/edgar.xml","form_type":"4"}},{"id":3337126,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-12-18T22:09:51.000Z","date":"2019-12-16","kind":"grant","acquired":true,"shares":3448,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 16, 2019, the Company granted 3,448 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of Directors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"On December 16, 2019, the Company granted 3,448 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of Directors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\"). At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."}],"balance_after":3448,"source":{"system":"sec-edgar","filing":"0000914190-19-000502","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000091419019000502/edgar.xml","form_type":"4"}},{"id":3497401,"issuer":{"id":6519,"kind":"organization","name":"MAMMOTH ENERGY SERVICES, INC.","symbol":"TUSK"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2019-06-07T20:35:21.000Z","date":"2019-06-05","kind":"grant","acquired":true,"shares":10493,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of June 5, 2020 and the date of the issuer's 2020 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."},{"field":"shares","element":"transactionShares","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of June 5, 2020 and the date of the issuer's 2020 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant. These securities will vest on the earlier of June 5, 2020 and the date of the issuer's 2020 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."}],"balance_after":10493,"source":{"system":"sec-edgar","filing":"0001048462-19-000039","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000104846219000039/form4.xml","form_type":"4"}},{"id":3683964,"issuer":{"id":6519,"kind":"organization","name":"MAMMOTH ENERGY SERVICES, INC.","symbol":"TUSK"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2019-01-29T22:41:31.000Z","date":"2019-01-25","kind":"grant","acquired":true,"shares":1549,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant, pro-rated for the period beginning on January 25, 2019 and ending on June 7, 2019. These securities will vest on the earlier of June 7, 2019 or the date of the issuer's 2019 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."},{"field":"shares","element":"transactionShares","label":"F1","text":"These securities are restricted stock units that were granted under the issuer's equity incentive plan, representing an annual non-employee director grant, pro-rated for the period beginning on January 25, 2019 and ending on June 7, 2019. These securities will vest on the earlier of June 7, 2019 or the date of the issuer's 2019 Annual Meeting of Stockholders. Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units have been assigned to Wexford Capital LP under the terms of Mr. Amron's employment with Wexford Capital LP. As a result, Mr. Amron disclaims any interest in these restricted stock units, except for his pecuniary interest therein."}],"balance_after":1549,"source":{"system":"sec-edgar","filing":"0001048462-19-000006","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000104846219000006/form4.xml","form_type":"4"}},{"id":3721475,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2018-12-21T21:55:19.000Z","date":"2018-12-19","kind":"grant","acquired":true,"shares":46457,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On December 19, 2018, the Company granted an option to purchase 46,457 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the Company. The Option was granted under the Company's 2015 Equity Incentive Plan (\"the 2015 Plan\"). At the request of Mr. Amron, the Option was granted to Wexford Capital LP. The Option vests as to 15,486 shares on each of 12/19/18 and 12/19/19, and as to 15,485 shares on 12/19/20."}],"balance_after":46457,"derivative":{"exercise_price":0.65,"expiration_date":"2028-12-19","underlying":"Common Stock","underlying_shares":46457},"source":{"system":"sec-edgar","filing":"0000914190-18-000587","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000091419018000587/edgar.xml","form_type":"4"}},{"id":3727327,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-12-18T22:23:42.000Z","date":"2018-12-14","kind":"grant","acquired":true,"shares":47673,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"On December 14, 2018, the Company granted 47,673 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of Directors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\").  At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."},{"field":"shares","element":"transactionShares","label":"F1","text":"On December 14, 2018, the Company granted 47,673 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of Directors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\").  At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"On December 14, 2018, the Company granted 47,673 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of Directors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\").  At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."}],"balance_after":47673,"source":{"system":"sec-edgar","filing":"0000914190-18-000561","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000091419018000561/edgar.xml","form_type":"4"}},{"id":4122596,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Qualified Stock Option","published_at":"2017-12-22T16:37:22.000Z","date":"2017-12-20","kind":"grant","acquired":true,"shares":40284,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On December 20, 2017, the Company granted an option to purchase 40,284 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the Company.  The Option was granted under the 2015 Plan.  At the request of Mr. Amron, the Option was granted to Wexford Capital LP.  The Option vests as to 13,428 shares on each of 12/20/17, 12/20/18 and 12/20/19."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"On December 20, 2017, the Company granted an option to purchase 40,284 shares of common stock of the Company (the \"Option\") in respect of the service by Mr. Amron as a member of the Board of Directors of the Company.  The Option was granted under the 2015 Plan.  At the request of Mr. Amron, the Option was granted to Wexford Capital LP.  The Option vests as to 13,428 shares on each of 12/20/17, 12/20/18 and 12/20/19."}],"balance_after":40284,"derivative":{"exercise_price":0.4999,"expiration_date":"2027-12-27","underlying":"Common Stock","underlying_shares":40284},"source":{"system":"sec-edgar","filing":"0000914190-17-000395","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000091419017000395/edgar.xml","form_type":"4"}},{"id":4122595,"issuer":{"id":7279,"kind":"organization","name":"NEPHROS INC","symbol":"NEPH"},"owners":[{"id":23456,"kind":"person","name":"Amron Arthur H","position":1,"cik":"0001179697","reported_name":"AMRON ARTHUR H","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-12-22T16:37:22.000Z","date":"2017-12-20","kind":"grant","acquired":true,"shares":73864,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"On December 20, 2017, the Company granted 73,864 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of Directors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\").  At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."},{"field":"shares","element":"transactionShares","label":"F1","text":"On December 20, 2017, the Company granted 73,864 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of Directors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\").  At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"On December 20, 2017, the Company granted 73,864 shares of restricted stock of the Company (the \"Restricted Stock\") in lieu of cash fees payable to Mr. Amron in respect of his services as a member of the Board of Directors of the Company. The Restricted Stock was granted under the Company's 2015 Equity Incentive Plan (the \"2015 Plan\").  At the request of Mr. Amron, the Restricted Stock was granted to Wexford Capital LP. The Restricted Stock vests 6 months following the grant date."}],"balance_after":73864,"source":{"system":"sec-edgar","filing":"0000914190-17-000395","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1179697/000091419017000395/edgar.xml","form_type":"4"}}]}