Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 9,153	$ 14,904
Revenue receivable	26,568	17,742
Joint interest billing receivable	26,556	42,238
Other receivable	0	9,208
Derivative asset	521	830
Prepaid drilling costs	477	1,698
Other current assets	8,132	2,964
Total current assets	71,407	89,584
Oil and gas properties:
Oil and gas properties, full cost method	2,035,899	1,734,477
Unevaluated oil and gas properties	98,387	71,713
Accumulated depreciation, depletion and amortization	(1,553,044)	(1,472,244)
Oil and gas properties, net	581,242	333,946
Other property and equipment	13,993	12,370
Accumulated depreciation of other property and equipment	(8,901)	(7,607)
Total property and equipment	586,334	338,709
Other assets, net of accumulated amortization of $5,689 and $4,240, respectively	9,449	5,110
Total assets	667,190	433,403
Current liabilities:
Accounts payable to vendors	47,341	58,960
Advances from co-owners	969	20,459
Oil and gas revenue payable	22,664	26,175
Accrued interest and preferred stock dividend	12,909	6,190
Asset retirement obligation	3,113	2,351
Derivative liability	1,617	233
Other accrued liabilities	8,924	6,535
Total current liabilities	97,537	120,903
Bank debt	75,000	50,000
10% Senior Notes	350,000	150,000
Asset retirement obligation	45,423	24,909
Other long-term liability	135	0
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 63,664 and 62,768 shares, respectively	64	63
Paid-in capital	280,711	276,534
Accumulated other comprehensive income (loss)	(1,096)	521
Accumulated deficit	(180,585)	(189,528)
Total stockholders’ equity	99,095	87,591
Total liabilities and stockholders’ equity	$ 667,190	$ 433,403