Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 3,137	$ 5,355
Accounts receivable
Oil, natural gas liquid and natural gas sales	15,991	15,103
Joint interest owners and other, net	1,310	4,541
Related parties	0	301
Derivative financial instruments	5,095	15,841
Prepaid expenses and other	2,208	1,966
Total current assets	27,741	43,107
Oil and gas properties, using the successful efforts method of accounting
Proved properties	1,050,168	960,711
Unproved properties	76,462	81,850
Other property and equipment	21,401	17,727
Less accumulated depreciation, depletion, amortization and impairment	(464,671)	(369,529)
Property and equipment, net	683,360	690,759
Accounts receivable related party	5,816	0
Derivative financial instruments	1,754	7,302
Other non-current assets	2,108	2,944
Total assets	720,779	744,112
Current liabilities
Accounts payable	33,355	18,260
Accounts payable – related parties	189	181
Oil, natural gas liquid and natural gas sales payable	14,811	13,022
Accrued liabilities	26,905	28,128
Derivative financial instruments	8,564	430
Current maturities of long-term debt	247,000	0
Total current liabilities	330,824	60,021
Long-term liabilities
Long-term debt	255,068	436,882
Asset retirement obligations	7,055	7,195
Deferred tax liability, net	931	12,370
Equity warrant liability	129	366
Equity warrant liability - related parties	235	689
Derivative financial instruments	1,898	21
Other non-current liabilities	3,752	4,021
Total long-term liabilities	269,068	461,544
Commitments and contingencies
Stockholders’ equity
Class A voting common stock, $0.001 par value, 100,000,000 shares authorized, 24,945,594 and 24,645,825 issued and outstanding, respectively	142,655	142,655
Series A-1 convertible participating preferred stock, $0.001 par value, 100,328 and 91,784 shares issued and outstanding, respectively	0	0
Additional paid-in capital	175,738	174,379
Accumulated deficit	(197,506)	(94,487)
Total stockholders’ equity	120,887	222,547
Total liabilities and stockholders’ equity	$ 720,779	$ 744,112