Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities
Net loss	$ (37,695)	$ (41,813)
Adjustments to reconcile net loss to net cash provided by operating activities:
Net loss (gain) on derivative contracts	32,645	(59,838)
Net cash settlements paid on derivative contracts	(255)	8,475
Gain on sale of non-oil and gas assets	(29)
Depreciation, depletion, amortization and accretion of future site restoration	8,139	12,154
Proved property impairment	0	81,557
Amortization of deferred financing fees and issuance discount	3,684	1,238
Stock-based compensation	507	599
Debt forgiveness	(1,384)	0
Non-cash interest expense	9,425	4,079
Non-cash hedge contract termination	9,944
Changes in operating assets and liabilities:
Accounts receivable	(3,949)	9,360
Other assets	(9,946)	1,553
Accounts payable and accrued expenses	(440)	(11,872)
Net cash provided by operating activities	10,646	5,492
Investing Activities
Capital expenditures, including purchases and development of properties	(393)	(10,581)
Proceeds from the sale of oil and gas properties	141	0
Proceeds from the sale of non-oil and gas properties	228	0
Net cash used in investing activities	(24)	(10,581)
Financing Activities
Proceeds from long-term borrowings	0	8,000
Payments on long-term borrowings	(6,646)	(2,139)
Deferred financing fees	(123)	(772)
Net cash (used in) provided by financing activities	(5,433)	5,089
Increase in cash and cash equivalents	5,189	0
Cash and cash equivalents at beginning of period	2,775	0
Cash and cash equivalents at end of period	7,964	0
Supplemental disclosures of cash flow information:
Interest paid	6,085	4,050
Non-cash investing and financing activities:
Non-cash interest paid in kind	9,425	5,129
Change in capital expenditures included in accounts payable	28	(4,479)
Change in future site restoration on properties sold	2,705	0
Paycheck Protection Program, CARES Act [Member]
Financing Activities
Proceeds from long-term borrowings	$ 1,336	$ 0