Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 4,812	$ 6,068
Accounts receivable:
Oil, natural gas liquid and natural gas sales	10,398	4,680
Joint interest owners and other, net	965	867
Related parties	245	847
Derivative financial instruments	3,121	1,730
Prepaid expenses and other	5,709	2,631
Total current assets	25,250	16,823
Oil and gas properties, net, using the successful efforts method of accounting	552,919	439,228
Other property and equipment, net	12,432	1,421
Derivative financial instruments	773
Other noncurrent assets	3,796	1,561
Restricted certificates of deposit	76	76
Total assets	595,246	459,109
Current liabilities
Accounts payable	12,386	14,894
Accounts payable – related parties	108	1,135
Oil, natural gas liquid and natural gas sales payable	7,521	3,568
Accrued liabilities	22,365	9,947
Accrued liabilities – related parties	78	224
Derivative financial instruments	1,991	2,985
Total current liabilities	44,449	32,753
Long-term debt	286,398	204,122
Long-term debt - related parties		3,400
Deferred tax liability	21,977	38,020
Other non-current liabilities	6,241	6,052
Equity warrant liability	439	1,565
Equity warrant liability - related parties	834	2,994
Asset retirement obligations	5,097	2,683
Derivative financial instruments	2,672	1,125
Total liabilities	368,107	292,714
Commitments and contingencies
Stockholders’ equity
Additional paid-in capital	100,146	87,260
Accumulated deficit	(90,374)	(63,517)
Total stockholders’ equity	152,427	166,395
Total liabilities and stockholders’ equity	595,246	459,109
Series A-2 Convertible Participating Preferred Stock
Mezzanine equity
Series A-2 convertible participating preferred stock, $0.001 par value, 76,577 issued and outstanding at September 30, 2017 and 0 issued and outstanding at December 31, 2016	74,712
Class A Voting Common Stock
Stockholders’ equity
Common stock	142,652	$ 142,652
Series A-1 and Series B Convertible Participating Preferred Stock
Stockholders’ equity
Series A-1 convertible participating preferred stock, $0.001 par value and Series B convertible participating preferred stock, $0.001 par value, 5,543 shares and 2,684,632 shares issued and outstanding at September 30, 2017, respectively, 0 and 0 issued and outstanding at December 31, 2016, respectively	3
Total stockholders’ equity	$ 3