Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 53,365	$ 148,013
Revenue receivable	7,318	6,476
Joint interest billing receivable	38,665	49,374
Derivative asset	1,277	1,508
Other current assets	6,119	3,874
Total current assets	106,744	209,245
Oil and gas properties:
Oil and gas properties, full cost method	1,310,800	1,310,891
Unevaluated oil and gas properties	11,751	12,516
Accumulated depreciation, depletion and amortization	(1,186,262)	(1,157,455)
Oil and gas properties, net	136,289	165,952
Other property and equipment	11,252	11,229
Accumulated depreciation of other property and equipment	(8,925)	(8,737)
Total property and equipment	138,616	168,444
Other assets, net of accumulated depreciation and amortization of $3,922 and $3,842, respectively	1,533	1,630
Total assets	246,893	379,319
Current liabilities:
Accounts payable to vendors	76,815	97,999
Advances from co-owners	4,097	16,118
Oil and gas revenue payable	23,108	18,911
Accrued interest and preferred stock dividend	2,942	12,795
Asset retirement obligation	5,545	6,015
Accrued acquisition cost	0	4,409
Other accrued liabilities	3,915	2,537
Total current liabilities	116,422	158,784
10% Senior Unsecured Notes due 2017	157,039	0
10% Senior Secured Notes due 2021	134,583	347,008
Asset retirement obligation	37,155	36,541
Other long-term liabilities	$ 1,349	$ 53
Commitments and contingencies
Stockholders’ deficit:
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 70,104 and 65,641 shares, respectively	70	66
Paid-in capital	293,072	290,382
Accumulated other comprehensive income	802	947
Accumulated deficit	(493,600)	(454,463)
Total stockholders’ deficit	(199,655)	(163,067)
Total liabilities and stockholders’ deficit	$ 246,893	$ 379,319