Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 2,432	$ 2,061
Accounts receivable, net:
Joint owners	5,647	8,883
Oil and gas production	16,366	10,887
Other	4,880	661
Total accounts receivable	26,893	20,431
Derivative asset - current	1,170	41
Assets held for sale	34,800	0
Other current assets	624	488
Total current assets	65,919	23,021
Oil and gas properties, full cost method of accounting:
Proved	550,407	563,317
Unproved properties excluded from depletion	3,779	2,089
Other property and equipment	38,249	37,833
Total	592,435	603,239
Less accumulated depreciation, depletion, and amortization	(404,088)	(390,407)
Total property and equipment - net	188,347	212,832
Deferred financing fees, net	2,817	3,397
Derivative asset - long-term	2,317	594
Other assets	693	763
Total assets	260,093	240,607
Current liabilities:
Accounts payable	41,971	42,387
Oil and gas production payable	14,006	6,947
Accrued interest	86	75
Other accrued expenses	2,139	962
Derivative liability - current	2,532	3,462
Current maturities of long-term debt	1,634	657
Total current liabilities	62,368	54,490
Long-term debt, excluding current maturities	131,023	124,101
Other liabilities	57	367
Derivative liability - long-term	510	3,568
Future site restoration	10,136	11,381
Total liabilities	204,094	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	928	927
Additional paid-in capital	252,184	250,998
Accumulated deficit	(196,796)	(205,256)
Accumulated other comprehensive (loss) income	(317)	31
Total stockholders' equity	55,999	46,700
Total liabilities and stockholders' equity	$ 260,093	$ 240,607