Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 14,209	$ 18,243
Revenue receivable	13,691	16,485
Joint interest billing receivable	32,202	46,778
Derivative asset	11,121	8,631
Prepaid drilling costs	1,033	847
Other current assets	6,684	5,566
Total current assets	78,940	96,550
Oil and gas properties:
Oil and gas properties, full cost method	2,270,360	2,222,753
Unevaluated oil and gas properties	88,762	109,119
Accumulated depreciation, depletion and amortization	(1,777,246)	(1,648,060)
Oil and gas properties, net	581,876	683,812
Other property and equipment	15,033	14,953
Accumulated depreciation of other property and equipment	(10,649)	(10,313)
Total property and equipment	586,260	688,452
Derivative asset	192	0
Other assets, net of accumulated depreciation and amortization of $8,426 and $7,847, respectively	5,563	5,893
Total assets	670,955	790,895
Current liabilities:
Accounts payable to vendors	88,057	102,954
Advances from co-owners	35,001	12,819
Oil and gas revenue payable	20,849	22,333
Accrued interest and preferred stock dividend	4,113	12,764
Asset retirement obligation	1,910	2,756
Derivative liability	138	0
Accrued acquisition costs	8,238	17,690
Other accrued liabilities	5,990	5,394
Total current liabilities	164,296	176,710
Bank debt	85,000	75,000
10% Senior Notes	350,000	350,000
Asset retirement obligation	53,448	52,214
Other long-term liability	447	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 64,815 and 64,721 shares, respectively	65	65
Paid-in capital	287,454	285,957
Accumulated other comprehensive income	7,018	5,420
Accumulated deficit	(276,774)	(154,534)
Total stockholders’ equity	17,764	136,909
Total liabilities and stockholders’ equity	$ 670,955	$ 790,895