Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 33,774	$ 148,013
Revenue receivable	11,850	6,476
Joint interest billing receivable	22,217	49,374
Derivative asset	0	1,508
Other current assets	4,247	3,874
Total current assets	72,088	209,245
Oil and gas properties:
Oil and gas properties, full cost method	1,325,114	1,310,891
Unevaluated oil and gas properties	8,058	12,516
Accumulated depreciation, depletion and amortization	(1,237,490)	(1,157,455)
Oil and gas properties, net	95,682	165,952
Other property and equipment	11,252	11,229
Accumulated depreciation of other property and equipment	(10,199)	(8,737)
Total property and equipment	96,735	168,444
Other assets, net of accumulated amortization of $0 and $3,842, respectively	5,546	1,630
Total assets	174,369	379,319
Current liabilities:
Accounts payable to vendors	46,166	97,999
Advances from co-owners	377	16,118
Oil and gas revenue payable	29,906	18,911
Accrued interest	397	11,720
Asset retirement obligation	1,132	6,015
Derivative liability	228	0
Accrued acquisition costs	5,000	4,409
10% Senior Unsecured Notes due 2017	22,538	0
Other accrued liabilities	2,481	3,612
Total current liabilities	108,225	158,784
10% Senior Unsecured Notes due 2017	0	347,008
Asset retirement obligation	40,593	36,541
Other long-term liabilities	3,969	53
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 21,115 and 16,410 shares, respectively	21	16
Paid-in capital	304,445	290,432
Accumulated other comprehensive (loss) income	(228)	947
Accumulated deficit	(541,049)	(454,463)
Total stockholders’ equity	(236,810)	(163,067)
Total liabilities and stockholders’ equity	174,369	379,319
10% Senior Secured Notes due 2021 | Senior Notes
Current liabilities:
10% Senior Secured Notes	15,286	0
10% Senior Secured PIK Notes due 2021 | Payment in Kind (PIK) Note
Current liabilities:
10% Senior Secured Notes	$ 243,106	$ 0