CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Total revenues	$ 32,343	$ 47,740
Operating expenses:
Lease operating and workover expense	8,160	10,128
Gathering, processing and transportation expense	3,614	2,825
Production taxes	2,012	3,129
Exploration expense	149	15
Depreciation, depletion and amortization expense	24,354	21,504
Impairment expense		3,330
General and administrative expense	5,550	5,289
(Gain) loss on commodity derivative financial instruments	(95,863)	33,343
Other expense (income), net	181	(19)
Total operating expenses	(51,843)	79,544
Income (loss) from operations:	84,186	(31,804)
Other expense
Interest expense	(12,377)	(9,779)
Total other expense	(12,377)	(9,779)
Income (loss) before income taxes	71,809	(41,583)
Income taxes
Current benefit (expense)	83
Deferred benefit (expense)	(11,650)	4,374
Total income tax benefit (expense)	(11,567)	4,374
Net income (loss)	$ 60,242	$ (37,209)
Income (loss) per common share
Basic	$ 8.76	$ (5.41)
Diluted	$ 8.76	$ (5.41)
Weighted average shares outstanding
Basic	6,874,848	6,873,950
Diluted	6,874,854	6,873,950
Comprehensive income (loss)
Net income (loss)	$ 60,242	$ (37,209)
Other comprehensive income (loss):
Foreign currency translation	428	(22)
Total comprehensive income (loss)	60,670	(37,231)
Oil sales
Revenues:
Total revenues	28,356	40,796
Natural gas sales
Revenues:
Total revenues	2,187	3,278
Natural gas liquid sales
Revenues:
Total revenues	$ 1,800	$ 3,666