CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 7,352	$ 8,475
Accounts receivable - trade	19,930	18,110
Restricted investments in U.S. Treasury Bonds-available for sale, at fair value	134	142
Derivative financial instruments	895
Other current assets	1,965	1,096
Total current assets	30,276	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 $18,491 and $20,507 as of June 30, 2013 and December 31, 2012)	313,135	301,599
Property and equipment-at cost, net	18,957	17,941
Restricted investments in U.S. Treasury Bonds-available for sale, at fair value	1,211	1,273
Other assets	4,020	4,108
Derivative financial instruments	310
Total other assets	337,633	324,921
Total assets	367,909	352,744
Current Liabilities
Current maturities of debentures and other long-term liabilities	1,590	1,790
Accounts payable and accruals	41,846	29,278
Derivative financial instruments		385
Total current liabilities	43,436	31,453
Long-Term Liabilities
Debentures, less current portion	1,472	1,472
Other long-term liabilities, less current portion	27,204	26,710
Derivative financial instruments		567
Line of credit	89,500	99,500
Total noncurrent liabilities	118,176	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 72,972,808 shares in 2013 and 72,440,898 shares in 2012	7	7
Additional paid-in-capital	469,707	468,406
Accumulated deficit	(263,044)	(275,058)
Accumulated other comprehensive income, net of applicable income taxes of $149 in 2013 and $188 in 2012	227	287
Total stockholders' equity including common stock in Treasury	207,025	193,770
Less common stock in Treasury-at cost; 632,250 shares in 2013 and 2012	728	728
Total stockholders' equity	206,297	193,042
Total liabilities and stockholders' equity	$ 367,909	$ 352,744