Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Revenues	$ 66,063	$ 70,216
Operating expenses:
Production taxes	3,302	3,709
General and administrative	28,371	33,251
Depreciation, depletion, amortization and accretion	33,252	25,367
Impairment of oil and natural gas properties	228,324	0
Total operating expenses	313,336	79,562
Operating loss	(247,273)	(9,346)
Other income (expense):
Loss on early extinguishment of debt	(1,299)	(20,370)
Gain (loss) from commodity derivatives	(8,985)	55
Change in fair value of financial instruments	(3,573)	58,343
Interest expense	(11,426)	(32,827)
Other income	435	2
Total other income (expense)	(24,848)	5,203
Net loss before income taxes	(272,121)	(4,143)
Income tax expense	0	0
Net loss	(272,121)	(4,143)
Paid-in-kind dividends on preferred stock	(25,397)	(10,687)
Net loss attributable to common stockholders	$ (297,518)	$ (14,830)
Net loss per common share-basic and diluted: (Note 18)
Basic (in dollars per share)	$ (3.38)	$ (0.24)
Diluted (in dollars per share)	$ (3.38)	$ (0.47)
Weighted average common shares outstanding:
Basic (in shares)	87,912,362	62,854,214
Diluted (in shares)	87,912,362	78,451,341
Oil sales
Revenues:
Revenues	$ 59,015	$ 58,042
Operating expenses:
Costs of goods and services sold	16,127	13,843
Natural gas sales
Revenues:
Revenues	3,180	5,246
Natural gas liquid sales
Revenues:
Revenues	3,868	6,928
Gathering, processing and transportation
Operating expenses:
Costs of goods and services sold	$ 3,960	$ 3,392