CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 11,620	$ 8,475
Accounts receivable-trade, net	21,874	18,110
Restricted investments in U.S. Treasury bonds-available for sale, at fair value (amortized cost of $100 in 2013 and $94 in 2012)	131	142
Other current assets	1,859	1,096
Total current assets	35,484	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 $18,015 and $20,507 as of December 31, 2013 and 2012)	335,354	301,599
Property and equipment-at cost, net	18,772	17,941
Restricted investments in U.S. Treasury bonds-available for sale, at fair value (amortized cost of $904 in 2013 and $849 in 2012)	1,183	1,273
Other assets	3,969	4,108
Derivative financial instruments	43
Total other assets	359,321	324,921
Total assets	394,805	352,744
Current Liabilities
Current maturities of debentures and other long-term liabilities	1,936	1,790
Accounts payable and accrued expenses	39,174	29,278
Derivative financial instruments	3,517	385
Total current liabilities	44,627	31,453
Long-Term Liabilities
Debentures, less current portion	1,472	1,472
Other long-term liabilities, less current portion	28,113	26,710
Derivative financial instruments		567
Line of credit	94,500	99,500
Total noncurrent liabilities	124,085	128,249
Commitments and contingencies (Note F)
Stockholders' Equity
8% convertible preferred stock-$.0001 par value; 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, 72,887,650 shares in 2013 and 72,440,898 shares in 2012	7	7
Additional paid-in capital	470,441	468,406
Accumulated deficit	(244,673)	(275,058)
Accumulated other comprehensive income, net of applicable income taxes of $124 in 2013 and $188 in 2012	190	287
Total stockholders' equity including common stock in Treasury	226,093	193,770
Less common stock in Treasury-at cost; 632,250 shares in 2012		728
Total Stockholders' Equity	226,093	193,042
Total liabilities and stockholders' equity	$ 394,805	$ 352,744