Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Revenues	$ 9,987	$ 11,597	$ 28,339	$ 50,868
Operating expenses:
Production taxes	482	543	1,259	2,568
General and administrative	3,375	4,852	15,541	23,913
Depreciation, depletion, accretion and amortization	4,254	5,420	9,999	22,762
Impairment of oil and natural gas properties	62,206	16,580	94,900	16,580
Total operating expenses	72,771	32,580	131,965	82,044
Loss from operations	(62,784)	(20,983)	(103,626)	(31,176)
Other income (expense):
Loss on early extinguishment of debt		(1,299)		(1,299)
Gain (loss) from commodity derivatives, net	167	3,943	16,299	(3,733)
Change in fair value of financial instruments			3,238	(335)
Interest expense	(2,178)	(2,186)	(7,582)	(8,859)
Reorganization items, net	(9,526)		(11,883)
Other income (expense)	(82)	116	(4)	31
Total other income (expense)	(11,619)	574	68	(14,195)
Net loss before income taxes	(74,403)	(20,409)	(103,558)	(45,371)
Net loss	(74,403)	(20,409)	(103,558)	(45,371)
Dividends on preferred stock	(7,504)	(7,185)	(22,010)	(18,385)
Net loss attributable to common stockholders	$ (81,907)	$ (27,594)	$ (125,568)	$ (63,756)
Net loss per common share-basic and diluted: (Note 16)
Basic	$ (0.86)	$ (0.30)	$ (1.32)	$ (0.74)
Diluted	$ (0.86)	$ (0.30)	$ (1.32)	$ (0.74)
Weighted average common shares outstanding:
Basic	95,097,919	91,349,994	94,907,590	86,734,449
Diluted	95,097,919	91,349,994	94,907,590	86,734,449
Oil Sales [Member]
Revenues:
Revenues	$ 8,250	$ 10,206	$ 25,917	$ 44,890
Natural Gas Sales [Member]
Revenues:
Revenues	995	694	1,284	2,570
Natural Gas Liquid Sales [Member]
Revenues:
Revenues	742	697	1,138	3,408
Natural Gas Production [Member]
Operating expenses:
Cost of Goods and services sold	1,630	4,243	8,752	12,866
Gathering Processing and Transportation [Member]
Operating expenses:
Cost of Goods and services sold	$ 824	$ 942	$ 1,514	$ 3,355