Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 91,111	$ 26,854
Restricted cash	890	1,001
Accounts receivable, net	73,776	87,842
Other receivables	3,635	6,331
Related party receivables, net	2,310	3,341
Prepaid expenses and other	5,575	1,125
Derivatives	4,727	16,423
Total current assets	182,024	142,917
Property and equipment, net
Oil and gas properties, successful efforts method	784,079	763,337
Other property and equipment	470,547	444,269
Total property and equipment, net	1,254,626	1,207,606
Other assets
Operating lease right-of-use assets, net	8,180
Equity method investment	1,842	1,100
Deferred financing costs, net	2,836	3,195
Deposits and other long-term assets	41	65
Derivatives	2,508	2,947
Total other assets	15,407	7,307
Total assets	1,452,057	1,357,830
Current liabilities
Current portion of debt	1,089,162	690,123
Accounts payable and accrued liabilities	109,901	247,439
Advances from non-operators	1,755	5,193
Advances from related party	4,003	9,839
Asset retirement obligations, current portion	44	2,079
Current operating lease liability	1,018
Derivatives	840	1,710
Total current liabilities	1,206,723	956,383
Long-term liabilities
Asset retirement obligations, net of current portion	12,442	9,473
Long-term debt, net	0	174,000
Other long-term liabilities	5,096	1,667
Operating lease liabilities, net of current portion	13,962
Derivatives	189	180
Total long-term liabilities	31,689	185,320
Total liabilities	1,238,412	1,141,703
Additional paid in capital	1,509,716	1,503,382
Accumulated deficit	(1,538,975)	(1,532,813)
Total stockholders’ equity	(29,221)	(29,393)
Noncontrolling interests	242,866	245,520
Total equity	213,645	216,127
Total liabilities and stockholders’ equity	1,452,057	1,357,830
Preferred Class A
Long-term liabilities
Preferred Stock, $0.0001 par value	0	0
Preferred Class B
Long-term liabilities
Preferred Stock, $0.0001 par value	0	0
Common Class A
Long-term liabilities
Common stock, $0.0001 par value	18	18
Common Class C
Long-term liabilities
Common stock, $0.0001 par value	$ 20	$ 20