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Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Operating activities:    
Net loss $ (1,322) $ (2,064)
Adjustments to reconcile net loss to net cash used in operating activities:    
Unrealized loss (gain) on derivative instruments 54 (71)
Depreciation and amortization 27 21
Loss on equity method investment 246 381
Employee stock option expense 348 349
Deferred income tax expense 4 93
Amortization of discount on long-term debt 102 114
Gain on asset and equity security sales (1,464) (1,870)
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets 72 (145)
Accounts payable and other current liabilities 46 (362)
Net cash used in operating activities (1,887) (3,554)
Investing activities:    
Additions to mineral properties (1,047) (1,680)
Additions to other assets (9) (50)
Proceeds from sale of mineral property 6,000   
Proceeds from sale of marketable equity securities 1,591 1,964
Net cash provided by investing activities 6,535 234
Financing activities:    
Short-term borrowing 1,465 1,075
Repayment of short-term borrowing (360) (1,926)
Repayment of long-term debt (750) (500)
Proceeds from sale of common stock, net 275 8,937
Noncontrolling interest contribution 50 80
Proceeds from exercise of options    181
Payment to noncontrolling investor (150) (100)
Net cash provided by financing activities 530 7,747
Net increase in cash and cash equivalents 5,178 4,427
Cash and cash equivalents, beginning of period 432 478
Cash and cash equivalents, end of period 5,610 4,905
Repayment of loan by noncontrolling interest, net     
Issuance of stock to noncontrolling interest 41   
Transfer of contra-noncontrolling interest to noncontrolling interest upon earn-in 531   
Disproportionate share entry from noncontrolling interest to additional paid-in-capital upon earn-in 2,983   
Royalty sale receivable 4,000   
Reclassification of stock option liability to additional paid-in-capital    1,240
Reclassification of stock option liability to accumulated deficit, net of deferred taxes of $543    $ 992