Equus Energy, LLC (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 22,300	$ 23,465
Total assets	40,937	39,716
Current liabilities:
Total liabilities	3,502	3,351
Total member's equity	37,435	36,365	$ 34,075	$ 33,777
Equus Energy, LLC [Member]
Current assets:
Cash and cash equivalents	510	640
Accounts receivable	388	215
Total current assets	898	855
Oil and gas properties	8,097	8,097
Less: accumulated depletion, depreciation and amortization	(8,093)	(8,093)
Net oil and gas properties	4	4
Total assets	902	859
Current liabilities:
Accounts payable and other	150	103
Due to affiliate	350	350
Total current liabilities	500	453
Asset retirement obligations	215	214
Total liabilities	715	667
Total member's equity	187	192
Total liabilities and member's equity	$ 902	$ 859