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Marketable Securities and Fair Value Measurements (Details 3) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Increase in fair value included in change in fair value of common stock warrants | $ (3,000) | $ (616,000) | $ 511,000 | $ (929,000)
Using Significant Unobservable Inputs (Level 3) [Member] |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at January 1, 2016 |  |  | 1,301,138 |
Increase in fair value included in change in fair value of common stock warrants |  |  | 511,364 |
Balance at September 30, 2016 | $ 1,812,502 |  | $ 1,812,502 |

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- Definition Amount of gain (loss) recognized on the income statement for 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)(1) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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