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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 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 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 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":"F4","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":"F4","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":115942,"derivative":{"underlying":"Common Stock"},"source":{"system":"sec-edgar","filing":"0001437749-23-009323","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774923009323/rdgdoc.xml","form_type":"4"}},{"id":1930881,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52354,"kind":"person","name":"Lovell Heath Aaron","position":1,"cik":"0001970432","reported_name":"Lovell Heath Aaron","relationship":{"other":true,"other_text":"President-Hallador Power"}}],"security":"COMMON STOCK","published_at":"2023-04-04T20:37:00.000Z","date":"2023-03-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":25649,"price":9.19,"value":235714.31,"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."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The closing stock price on the day of vesting."}],"balance_after":32322,"source":{"system":"sec-edgar","filing":"0001437749-23-009323","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774923009323/rdgdoc.xml","form_type":"4"}},{"id":1930880,"issuer":{"id":5143,"kind":"organization","name":"HALLADOR ENERGY CO"},"owners":[{"id":52354,"kind":"person","name":"Lovell Heath Aaron","position":1,"cik":"0001970432","reported_name":"Lovell Heath Aaron","relationship":{"other":true,"other_text":"President-Hallador Power"}}],"security":"COMMON STOCK","published_at":"2023-04-04T20:37:00.000Z","date":"2023-03-31","kind":"exercise","planned":false,"acquired":true,"shares":57971,"price":9.19,"value":532753.49,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares acquired through the vesting of Restricted Stock Units on March 31, 2023.  Each restricted stock unit represents 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":"The closing stock price on the day of vesting."}],"balance_after":57971,"source":{"system":"sec-edgar","filing":"0001437749-23-009323","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/788965/000143774923009323/rdgdoc.xml","form_type":"4"}}]}