CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 10,745	$ 8,475
Accounts receivable - trade	19,560	18,110
Restricted investments in U.S. Treasury Bonds-available for sale, at fair value	141	142
Other current assets	1,153	1,096
Total current assets	31,599	27,823
Other Assets
Oil and gas properties-at cost, based on full cost method of accounting, net of accumulated depreciation, depletion and amortization (includes unproved properties excluded from amortization of $19,581 and $20,507 as of March 31, 2013 and December 31, 2012)	297,517	301,599
Property and equipment-at cost, net	18,687	17,941
Restricted investments in U.S. Treasury Bonds-available for sale, at fair value	1,271	1,273
Other assets	4,056	4,108
Total other assets	321,531	324,921
Total assets	353,130	352,744
Current Liabilities
Current maturities of debentures and other long-term liabilities	1,790	1,790
Accounts payable and accruals	35,049	29,278
Derivative financial instruments	1,718	385
Total current liabilities	38,557	31,453
Long-Term Liabilities
Debentures, less current portion	1,472	1,472
Other long-term liabilities, less current portion	26,539	26,710
Derivative financial instruments	700	567
Line of credit	89,500	99,500
Total noncurrent liabilities	118,211	128,249
Commitments and Contingencies
Stockholders' Equity
8% convertible preferred stock, par value $.0001; authorized 10,000,000 shares, issued and outstanding, 10,703 shares in 2013 and 2012 (aggregate liquidation preference $128 in 2013 and 2012)	128	128
Common stock - $.0001 par value; authorized, 100,000,000 shares; issued 72,764,572 shares in 2013 and 72,440,898 shares in 2012	7	7
Additional paid-in-capital	468,909	468,406
Accumulated deficit	(272,230)	(275,058)
Accumulated other comprehensive income, net of applicable income taxes of $181 in 2013 and $188 in 2012	276	287
Total stockholders' equity excluding common stock in Treasury	197,090	193,770
Less common stock in Treasury-at cost; 632,250 shares in 2013 and 2012	728	728
Total stockholders' equity	196,362	193,042
Total liabilities and stockholders' equity	$ 353,130	$ 352,744