Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 154	$ 2,061
Accounts receivable, net:
Joint owners	11,835	8,883
Oil and gas production	16,768	10,887
Other	618	661
Total accounts receivable	29,221	20,431
Total accounts receivable	29,221	20,431
Derivative asset - current	92	41
Assets held for sale.	2,746	0
Other current assets	555	488
Total current assets	32,768	23,021
Oil and gas properties, full cost method of accounting:
Proved	576,311	563,317
Unproved properties excluded from depletion	3,499	2,089
Other property and equipment	38,196	37,833
Total	618,006	603,239
Less accumulated depreciation, depletion, and amortization	(396,816)	(390,407)
Total property and equipment - net	221,190	212,832
Deferred financing fees, net	3,061	3,397
Derivative asset - long-term	381	594
Other assets	761	763
Total assets	258,161	240,607
Current liabilities:
Accounts payable	45,109	42,387
Oil and gas production payable	14,257	6,947
Accrued interest	96	75
Other accrued expenses	1,330	962
Derivative liability - current	4,216	3,462
Current maturities of long-term debt	1,155	657
Total current liabilities	66,163	54,490
Long-term debt, excluding current maturities	129,556	124,101
Other liabilities	366	367
Derivative liability - long-term	3,244	3,568
Future site restoration	11,201	11,381
Total liabilities	210,530	193,907
Stockholders' Equity
Preferred stock, par value $.01 per share, authorized 1,000,000 shares; -0- issued and outstanding	0	0
Common stock, par value $0.01 per share, authorized 200,000,000 shares; 92,734,262 and 92,733,448 issued and outstanding	927	927
Additional paid-in capital	251,472	250,998
Accumulated deficit	(204,661)	(205,256)
Accumulated other comprehensive (loss) income	(107)	31
Total stockholders' equity	47,631	46,700
Total liabilities and stockholders' equity	$ 258,161	$ 240,607