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Condensed Consolidated Statements of Cash Flows (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Operating activities: |  |
Net loss | $ (4,473,447) | $ (4,209,665)
Reconciliation of net loss to cash used in operations: |  |
Accretion/amortization of asset retirement obligations | 97,435 | 23,119
Depreciation and depletion | 121,878 | 148,206
Impairment of uranium properties | 279,429 | 268,923
Decrease in restoration and reclamation accrual | (489,153) | (430,185)
Stock compensation expense | 244,985 | 192,818
Other non-cash items, net |  | 609
Effect of changes in operating working capital items: |  |
(Increase) decrease in receivables | 276,801 | (280,911)
(Increase) in prepaid and other current assets | (21,534) | (12,952)
Increase in payables, accrued liabilities and deferred credits | 76,474 | 1,157,389
Net cash used in operating activities | (3,887,132) | (3,142,649)
Cash flows from investing activities: |  |
Increase in certificates of deposit, restricted | (5,632) | (36,474)
Increase in note receivable |  | (917,457)
Additions to uranium properties | (15,726) | (361,426)
Net cash used in investing activities | (21,358) | (1,315,357)
Cash flows from financing activities: |  |
Payments on borrowings | (39,770) | (15,638)
Issuance of common stock, net | 3,633,883 | 11,490,753
Net cash provided by financing activities | 3,594,113 | 11,475,115
Net increase (decrease) in cash and cash equivalents | (314,377) | 7,017,109
Cash and cash equivalents, beginning of period | 4,664,596 | 2,890,263
Cash and cash equivalents, end of period | 4,350,219 | 9,907,372
Non-cash transactions: |  |
Issuance of common stock for short term loan principal and interest payment | 5,095,833 |
Issuance of common stock for services | 291,500 |
Issuance (forfeiture) of restricted stock issued to employee | $ 48 | $ (16)

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- Definition The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + 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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- Definition The fair value of stock issued in noncash financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 -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 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 + Details
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- Definition Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders. + References No definition available. + Details
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