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Common Stock - Summary of Fair Value of Warrants Issued (Detail)
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9 Months Ended | |
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Sep. 30, 2014
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Sep. 30, 2013
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Series A Warrants [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Risk-free interest rates | 0.15% | 0.36% |
| Expected dividend yield | 0.00% | 0.00% |
| Expected life | 1 year 22 days | 2 years 22 days |
| Expected volatility | 102.90% | 40.66% |
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Series A and Series B Warrants issued in July 2014 Financing [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Risk-free interest rates | 1.68% | |
| Expected dividend yield | 0.00% | |
| Expected life | 4 years 9 months | 0 years |
| Expected volatility | 61.81% | |
| X | ||||||||||
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- Definition
Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Risk-free interest rate assumption used in valuing an instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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