Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 3,441	$ 5,355
Accounts receivable
Oil, natural gas liquid and natural gas sales	16,594	15,103
Joint interest owners and others, net	5,159	4,541
Related parties	5,213	301
Derivative financial instruments	15,798	15,841
Prepaid expenses and other	2,844	1,966
Total current assets	49,049	43,107
Oil and gas properties, using the successful efforts method of accounting
Proved properties	1,009,545	960,711
Unproved properties	80,565	81,850
Other property and equipment	21,344	17,727
Less accumulated depreciation, depletion and amortization	(392,604)	(369,529)
Property and equipment, net	718,850	690,759
Derivative financial instruments	9,857	7,302
Other non-current assets	2,457	2,944
Total assets	780,213	744,112
Current liabilities
Accounts payable	34,363	18,260
Accounts payable – related parties	251	181
Oil, natural gas liquid and natural gas sales payable	15,286	13,022
Accrued liabilities	16,100	28,128
Derivative financial instruments	3,271	430
Total current liabilities	69,271	60,021
Long-term liabilities
Long-term debt	499,772	436,882
Asset retirement obligations	7,139	7,195
Deferred tax liabilities, net	5,387	12,370
Warrant liability	162	366
Warrant liability – related parties	299	689
Derivative financial instruments	4	21
Other non-current liabilities	3,360	4,021
Total long-term liabilities	516,123	461,544
Commitments and contingencies (Note 12)
Stockholders' Equity
Class A voting common stock, $0.001 par value, 100,000,000 shares authorized, 24,933,853 and 24,645,825 issued and outstanding, respectively	142,655	142,655
Series A-1 convertible participating preferred stock, $0.001 par value, 98,120 and 91,784 shares issued and outstanding, respectively	0	0
Additional paid-in capital	175,709	174,379
Accumulated deficit	(123,545)	(94,487)
Total stockholders' equity	194,819	222,547
Total liabilities and stockholders' equity	$ 780,213	$ 744,112