Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
CURRENT ASSETS:
Cash and cash equivalents	$ 454	$ 37
Accounts receivable:
Oil and natural gas sales, net of allowance of $50 ($50 at December 31, 2010)	9,657	9,797
Joint interest operations, net of allowance of $479 ($479 at December 31, 2010)	724	631
Other, net of allowance of $34 ($48 at December 31, 2010)	152	155
Derivative assets	0	1,340
Prepaid expenses	1,030	1,657
Deferred tax asset	7,422	3,526
Inventory	3,812	3,382
Other current assets	384	4
Total current assets	23,635	20,529
PROPERTIES AND EQUIPMENT, AT COST:
Proved oil and natural gas properties and equipment, using full cost accounting	702,668	689,472
Other property and equipment	10,438	10,072
Total properties and equipment, at cost	713,106	699,544
Less accumulated depreciation, amortization and impairment	(499,994)	(489,634)
Total properties and equipment	213,112	209,910
OTHER ASSETS:
Deferred tax asset	29,058	31,001
Deferred loan costs, net of accumulated amortization of $381 ($5,012 at December 31, 2010)	6,622	2,609
Other	978	952
Total assets	273,405	265,001
Accounts payable:
Trade	13,807	17,149
Oil and natural gas proceeds due others	9,455	9,414
Other	155	452
Accrued liabilities:
Compensation	1,794	1,948
Interest	502	2,448
Income taxes	334	699
Other	640	10
Derivative liabilities	1,576	0
Asset retirement obligations	352	639
Long-term debt due within one year	146	127
Total current liabilities	28,761	32,886
DERIVATIVE LIABILITIES	3,079	203
LONG-TERM DEBT	205,289	196,965
ASSET RETIREMENT OBLIGATIONS	31,504	30,770
OTHER LONG-TERM LIABILITIES	10	10
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY (DEFICIT):
Common stock, $0.0001 par value, 100,000,000 shares authorized, 83,386,299 and 82,597,829 shares issued, 79,120,829 and 78,386,983 shares outstanding at June 30, 2011 and December 31, 2010, respectively	8	8
Additional paid-in capital	227,720	226,042
Treasury stock - 4,265,470 shares (4,210,846 shares at December 31,2010) at cost	(7,084)	(6,976)
Accumulated deficit	(215,882)	(214,907)
Stockholders' equity	4,762	4,167
Total liabilities and stockholders' equity	$ 273,405	$ 265,001