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Fair Value Measurements (Details 2) (Using Significant Unobservable Inputs (Level 3) [Member], USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Using Significant Unobservable Inputs (Level 3) [Member] |  |
Change in fair value of the financial assets |  |
Balance at beginning of year | $ 100,000 | $ 0
Common stock warrant recorded at fair value upon acquisition | 501,000 | 237,000
Decrease in fair value included in change in fair value of common stock warrants | (333,800) | (137,000)
Balance at end of year | $ 267,200 | $ 100,000

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- Definition Fair value measurement using unobservable inputs (level 3) of warrants received. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Amount of gain (loss) recognized in earnings, arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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Period Type: | duration

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- Definition This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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