CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues
Total revenues	$ 40,329	$ 73,236
Expenses
Lease operating expenses	15,642	22,779
Production, ad valorem, and other taxes	3,199	5,080
Depreciation and depletion — oil and natural gas	24,855	36,465
Depreciation and amortization — other	2,634	2,943
Impairment	7,970	0
General and administrative	5,483	9,939
Employee termination benefits	3,254	0
(Gain) loss on derivative contracts	(10,226)	209
Other operating expense	277	82
Total expenses	53,088	77,497
Loss from operations	(12,759)	(4,261)
Other (expense) income
Interest expense, net	(637)	(585)
Other income (expense), net	76	(431)
Total other expense	(561)	(1,016)
Loss before income taxes	(13,320)	(5,277)
Income tax benefit	(650)	0
Net loss	$ (12,670)	$ (5,277)
Loss per share
Basic (in dollars per share)	$ (0.36)	$ (0.15)
Diluted (in dollars per share)	$ (0.36)	$ (0.15)
Weighted average number of common shares outstanding
Basic (in shares)	35,551	35,322
Diluted (in shares)	35,551	35,322
Oil, natural gas and NGL
Revenues
Total revenues	$ 40,139	$ 73,048
Other
Revenues
Total revenues	$ 190	$ 188