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Fair Value Measurement - Roll Forward for Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2013
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
Add loan proceeds | $ 13,820,264
Initial carrying value | 13,332,688
Less repayments of principal | (620,215)
Add accretion of discount | 196,771
Outstanding warrants [Member] |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
Balance at December 31, 2012 | 9,157,397
Less fair value of warrants exercise | (470,303)
Add change in fair value of warrants | (3,145,285)
Balance at December 31, 2013 | 5,541,809
Loan Payable [Member] |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
Add loan proceeds | 13,820,264
Less discount | (487,576)
Initial carrying value | 13,332,688
Less repayments of principal | (620,215)
Add accretion of discount | 196,771
Balance at December 31, 2013 | 12,909,244
Current portion | 3,664,370
Non-current portion | $ 9,244,874

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- Definition Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value Noncurrent + References No definition available. + Details
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- Definition Long Term Debt Carrying Value + References No definition available. + Details
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- Definition Amount of the total principal payments made during the annual reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + 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=25499696&loc=d3e19207-110258 + Details
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- Definition Cash received from principal payments made on loans related to operating activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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