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SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED) - Costs Incurred (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Extractive Industries [Abstract]      
Property acquisition costs, proved $ 7,472 $ 0 $ 0
Property acquisition costs, unproved 5,386 6 6
Exploration costs 18 15 20
Development costs 688 547 761
Total costs $ 13,564 $ 568 $ 787