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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

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