Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 6,068	$ 4,322
Accounts receivable:
Oil, natural gas liquid and natural gas sales	4,680	5,043
Joint interest owners and other, net	867	1,305
Related parties	847	279
Derivative financial instruments	1,730	33,219
Prepaid expenses and other	2,631	724
Total current assets	16,823	44,892
Oil and gas properties, net, using the successful efforts method of accounting	439,228	488,100
Other property and equipment, net	1,421	2,223
Derivative financial instruments		2,864
Other noncurrent assets	1,561	1,580
Restricted certificates of deposit	76	77
Total assets	459,109	539,736
Current liabilities
Accounts payable	14,894	18,027
Accounts payable – related parties	1,135	45
Oil, natural gas liquid and natural gas sales payable	3,568	3,870
Accrued liabilities	9,947	8,276
Accrued liabilities – related parties	224	125
Derivative financial instruments	2,985
Total current liabilities	32,753	30,343
Long-term debt	204,122	301,926
Long-term debt - related parties	3,400
Deferred tax liability	38,020	16,013
Other non-current liabilities	6,052	1,000
Equity warrant liability	1,565
Equity warrant liability - related parties	2,994
Asset retirement obligations	2,683	7,488
Derivative financial instruments	1,125
Total liabilities	292,714	356,770
Commitments and contingencies
Stockholders’ equity
Additional paid-in capital	87,260	10,270
Accumulated other comprehensive loss		(760)
Retained (deficit) earnings	(63,517)	30,818
Total stockholders’ equity	166,395	182,966
Total liabilities and stockholders’ equity	459,109	539,736
Class A Voting Common Stock
Stockholders’ equity
Common stock	$ 142,652	$ 142,638