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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Cash flows (used in) from operating activities: |  |  |
Cash paid to suppliers and employees | $ (59,087) | $ (26,034) | $ (15,580)
Interest received | 94 | 112 | 127
Cash used in operating activities | (58,993) | (25,922) | (15,453)
Cash flows (used in) provided by investing activities: |  |  |
(Investment in) proceeds from short-term investments (maturity greater than 3 months) | (3,933) | 12,946 | (12,946)
Acquisition of mineral property interests | (10,059) | (1,300) |
Additions to property and equipment | (7,973) | (1,978) | (325)
Proceeds from disposal of property and equipment | 51 | 49 | 713
Investment in gold and silver bullion | (31,299) | (1,810) | (2,760)
Proceeds from sale of gold and silver bullion | 11,739 |  |
Investment in marketable equity securities | (284) | (4,023) |
Proceeds from sale of marketable equity securities | 1,853 |  |
(Increase) decrease to restricted investments securing reclamation | (413) |  | 161
Cash (used in) provided by investing activities | (40,318) | 3,884 | (15,157)
Cash flows from financing activities: |  |  |
Sale of common stock for cash, net of issuance costs | 105,415 |  | 46,301
Exercise of stock options and warrants | 773 | 809 | 141
Cash provided by financing activities | 106,188 | 809 | 46,442
Effect of exchange rate change on cash and cash equivalents | (279) | 357 | 1,558
Increase (decrease) in cash and cash equivalents | 6,598 | (20,872) | 17,390
Cash and cash equivalents, beginning of year | 6,818 | 27,690 | 10,300
Cash and cash equivalents, end of year | 13,416 | 6,818 | 27,690
Reconciliation of net loss to cash used in operating activities: |  |  |
Net loss | (61,872) | (33,091) | (27,698)
Adjustments to reconcile net loss from operating activities: |  |  |
Write-off of mineral property interests |  | 5,878 | 16,580
Deferred income taxes | (180) | (1,998) | (6,376)
Gain on sale of gold and silver bullion | (2,075) |  |
Unrealized loss on silver bullion | 3,394 |  |
Gain on sale of marketable equity securities | (19) |  |
(Gain) loss on disposal of property and equipment | (36) | (29) | 526
Stock-based compensation | 2,671 | 1,595 | 1,292
Accretion of asset retirement obligation | 524 | 515 | 762
Depreciation | 577 | 454 | 625
Foreign exchange loss (gain) | 279 | (357) | (1,558)
Other operating adjustments and write-downs | 82 |  | (77)
Change in non-cash working capital items: |  |  |
(Increase) decrease in other assets related to operations | (5,042) | (292) | 231
Increase in liabilities related to operations | 2,704 | 1,403 | 240
Cash used in operating activities | $ (58,993) | $ (25,922) | $ (15,453)

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- Definition Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3044-108585 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition The increase (decrease) during the reporting period in the aggregate amount of liabilities that result from activities that generate operating income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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