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Redeemable Convertible Preferred Stock (Tables) | 12 Months Ended
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Dec. 31, 2015
Equity [Abstract] |
Preferred Stock and Warrants Calculated Using the Black Scholes Merton Pricing Model | The preferred stock and warrants were issued for a total of $5.0 million. This amount was allocated to the preferred stock and warrants based on their relative fair values. The fair value of the warrants was calculated using the Black Scholes-Merton pricing model using the following weighted average assumptions, at the grant date:
Number of warrants |  | 325,000 |
Exercise price | $ | 6.62 |
Expected volatility of underlying stock |  | 74 | %
Risk-free interest rate |  | 1.62 | %
Dividend yield |  | 0 | %
Expected life of warrants |  | 8 years |
Weighted-average fair value of warrants | $ | 3.11 |
Expiration date |  | May 2, 2020 |

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- Definition Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, applied during the period to each separate class of assets, liabilities, and financial instruments classified in shareholders' equity that are measured on a recurring and/or nonrecurring basis. + 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 (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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