Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 148,013	$ 18,243
Revenue receivable	6,476	16,485
Joint interest billing receivable	49,374	46,778
Derivative asset	1,508	8,631
Other current assets	3,874	6,413
Total current assets	209,245	96,550
Oil and gas properties:
Oil and gas properties, full cost method	1,310,891	2,222,753
Unevaluated oil and gas properties	12,516	109,119
Accumulated depreciation, depletion and amortization	(1,157,455)	(1,648,060)
Oil and gas properties, net	165,952	683,812
Other property and equipment	11,229	14,953
Accumulated depreciation of other property and equipment	(8,737)	(10,313)
Total property and equipment	168,444	688,452
Other assets, net of accumulated amortization of $3,842 and $3,448, respectively	1,630	1,106
Total assets	379,319	786,108
Current liabilities:
Accounts payable to vendors	97,999	102,954
Advances from co-owners	16,118	12,819
Oil and gas revenue payable	18,911	22,333
Accrued interest and preferred stock dividend	12,795	12,764
Asset retirement obligation	6,015	2,756
Accrued acquisition costs	4,409	17,690
Other accrued liabilities	2,537	5,394
Total current liabilities	158,784	176,710
Bank debt		75,000
10% Senior Notes	347,008	345,213
Asset retirement obligation	36,541	52,214
Other long-term liability	$ 53	$ 62
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $.001 par value; authorized 5,000 shares; issued and outstanding 1,495 shares	$ 1	$ 1
Common stock, $.001 par value; authorized 150,000 shares; issued and outstanding 65,641 and 64,721 shares, respectively	66	65
Paid-in capital	290,382	285,957
Accumulated other comprehensive income	947	5,420
Accumulated deficit	(454,463)	(154,534)
Total stockholders’ equity	(163,067)	136,909
Total liabilities and stockholders’ equity	$ 379,319	$ 786,108