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Redeemable Convertible Preferred Stock - Preferred Stock and Warrants Calculated Using the Black Scholes Merton Pricing Model (Detail) | 12 Months Ended
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Dec. 31, 2015 $ / shares shares
Preferred stock and warrants calculated using the Black Scholes Merton pricing model |
Number of warrants | shares | 325,000
Expiration date | May 02, 2020
Warrant |
Preferred stock and warrants calculated using the Black Scholes Merton pricing model |
Exercise price | $ 6.62
Expected volatility of underlying stock | 74.00%
Risk-free interest rate | 1.62%
Dividend yield | 0.00%
Expected life of warrants | 8 years
Weighted-average fair value of warrants | $ 3.11

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- Definition Expiration date of warrants held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column A + Details
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