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Warrant Liability | 6 Months Ended
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Jun. 30, 2018
Warrants and Rights Note Disclosure [Abstract] |
Warrant Liability Disclosure [Text Block] |
| 7. | Warrant Liability
Until they expired by their terms on April 18, 2018, we had warrants outstanding to purchase an aggregate of 983,395 shares of common stock at an exercise price of $4.85 per share. The warrants contained a provision where the warrant holder had the option to receive cash equal to the Black Scholes fair value of the remaining unexercised portion of the warrant as cash settlement in the event that there was a fundamental transaction (contractually defined to include various merger, acquisition or stock transfer activities). Due to this provision, ASC 480, Distinguishing Liabilities from Equity required that these warrants be classified as liabilities. The fair value of these warrants was determined using the Lattice valuation model, and the changes in the fair value were recorded in the Condensed Statements of Operations and Comprehensive Loss.

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