Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 5,403	$ 9,153
Revenue receivable	24,215	26,568
Joint interest billing receivable	25,163	26,556
Derivative asset	1,387	521
Prepaid drilling costs	522	477
Other current assets	6,823	8,132
Total current assets	63,513	71,407
Oil and gas properties:
Oil and gas properties, full cost method	2,151,119	2,035,899
Unevaluated oil and gas properties	128,217	98,387
Accumulated depreciation, depletion and amortization	(1,624,980)	(1,553,044)
Oil and gas properties, net	654,356	581,242
Other property and equipment	14,887	13,993
Accumulated depreciation of other property and equipment	(9,952)	(8,901)
Total property and equipment	659,291	586,334
Derivative asset	132	0
Other assets, net of accumulated amortization of $7,295 and $5,689, respectively	6,501	9,449
Total assets	729,437	667,190
Current liabilities:
Accounts payable to vendors	47,979	47,341
Advances from co-owners	16,850	969
Oil and gas revenue payable	27,224	22,664
Accrued interest and preferred stock dividend	4,090	12,909
Asset retirement obligation	1,426	3,113
Derivative liability	106	1,617
Accrued acquisition cost	9,920	0
Other accrued liabilities	11,744	8,924
Total current liabilities	119,339	97,537
Bank debt	72,500	75,000
10% Senior Notes	350,000	350,000
Asset retirement obligation	47,398	45,423
Derivative liability	14	0
Accrued acquisition cost	10,000	0
Other long-term liability	127	135
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 64,412 and 63,664 shares, respectively	64	64
Paid-in capital	285,394	280,711
Accumulated other comprehensive income (loss)	879	(1,096)
Accumulated deficit	(156,279)	(180,585)
Total stockholders’ equity	130,059	99,095
Total liabilities and stockholders’ equity	$ 729,437	$ 667,190