Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 18,503	$ 10,034
Accounts receivable:
Joint owners, net	163	1,117
Oil and gas production sales	7,636	12,280
Other	0	150
Total accounts receivable	7,799	13,547
Other current assets	959	498
Total current assets	27,261	24,079
Property and equipment:
Proved oil and gas properties, full cost method	1,122,222	1,165,707
Other property and equipment	31,332	39,337
Total	1,153,554	1,205,044
Less accumulated depreciation, depletion, amortization and impairment	(1,095,495)	(1,099,075)
Total property and equipment, net	58,059	105,969
Operating lease right-of-use assets	4	173
Other assets	255	255
Total assets	85,579	130,476
Current liabilities:
Accounts payable	7,902	4,678
Joint interest oil and gas production payable	4,100	13,347
Accrued interest	3	477
Accrued expenses	534	347
Right of use liability	4	40
Derivative liabilities - short-term	0	442
Termination of derivative contracts	0	8,022
Current maturities of long-term debt	318	212,688
Total current liabilities	12,861	240,041
Operating lease right-of-use liabilities	0	110
Future site restoration	2,954	4,708
Total liabilities	17,859	247,064
Commitments and contingencies (Note 9)
Stockholders’ Equity:
Preferred stock, par value $0.01 per share – authorized 1,000,000 shares; 685,505 and -0- shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	7	0
Common stock, par value $0.01 per share, authorized 20,000,000 shares; 10,070,143 and 8,421,910 issued and outstanding at June 30, 2022 and December 31, 2021, respectively	101	84
Additional paid-in capital	571,888	430,422
Accumulated deficit	(504,276)	(547,094)
Total stockholders' equity (deficit)	67,720	(116,588)
Total liabilities and stockholders’ equity (deficit)	85,579	130,476
Debt Instruments Excluding PPP Loan [Member]
Current liabilities:
Long-term debt – less current maturities	$ 2,044	$ 2,205