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Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Operating activities:    
Net loss $ (3,598) $ (6,968)
Adjustments to reconcile net loss to net cash used in operating activities:    
Loss on derivative instruments 30 137
Depreciation and amortization 61 46
Loss on equity method investment 488 623
Property abandonment and impairment 31 10
Employee stock option expense 732 697
Deferred income taxes (648) (635)
Loss on warrant liability 488   
Amortization of interest on debt discounts 332 217
Gain on asset and equity security sales (1,536) (1,937)
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets 200 (2)
Accounts payable and other current liabilities (84) (119)
Net cash used in operating activities (3,504) (7,931)
Investing activities:    
Additions to mineral properties (3,457) (1,765)
Additions to other assets (397) (119)
Sale of derivative instrument, net 51 42
Proceeds from sale of mineral property 6,000   
Proceeds from sale of marketable equity securities 1,664 2,035
Proceeds from sale of other assets 9   
Net cash provided by investing activities 3,870 193
Financing activities:    
Short-term borrowing 2,665 1,075
Repayment of short-term borrowing (3,165) (1,947)
Repayment of long-term debt (750) (500)
Proceeds from issuance of debt, net 912   
Proceeds from issuance of common stock , net 275 8,937
Proceeds from exercise of options    247
Payment to noncontrolling interest (300) (200)
Noncontrolling interest contribution, net 181 80
Net cash provided by (used in) financing activities (182) 7,692
Net increase (decrease) in cash and cash equivalents 184 (46)
Cash and cash equivalents, beginning of year 432 478
Cash and cash equivalents, end of year 616 432
Supplemental disclosure of cash flow information:    
Cash paid for interest 87 71
Royalty sale receivable 4,000   
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   
Debt financing costs 588   
Issuance of stock to noncontrolling interest 71 140
Acquisition of mineral properties for stock    1,000
Loan to noncontrolling interest    504
Reclassification of stock option liability to additional paid-in capital, $1,240 and to retained earnings, $992, net of deferred taxes of $543 upon change in accounting principle    $ 2,775