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9. Fair Value of Warrants | 12 Months Ended
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Dec. 31, 2014
Notes to Financial Statements |
9. Fair Value of Warrants | The following tables summarize the assumptions used in computing the fair value of liability warrants subject to fair value accounting at the December 31, 2014:.
Expected dividend yield | 0%
Risk-free interest rate |  | 0. 89% - 1.1%
Expected volatility |  |  |  | 77.00% - 77.78%
Expected Life (years) |  | 2.5 - 3.0
Exercise price |  |  |  |  | $ 0.01
Company stock price |  | $ 5.79
There were no warrants granted during the year ended December 31, 2014 that were recorded as liabilities on the date of grant.

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