11. Stockholders' Equity (Details) - Warrants [Member] - $ / shares |
12 Months Ended | |
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Dec. 31, 2016 |
Dec. 31, 2015 |
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| Weighted-average expected dividend yield | 0.00% | 0.00% |
| Weighted-average expected volatility | 109.86% | 104.81% |
| Weighted-average risk-free interest rate | 0.97% | 1.03% |
| Weighted-average expected life of option (years) | 5 years | 5 years |
| Weighted-average exercise price | $ 10.40 | $ 25.41 |
| Model used | Black-Scholes | Black-Scholes |
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- Definition Agreed upon price for the exchange of the underlying asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Risk-free interest rate assumption used in valuing an instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average expected volatility of stock price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition This item represents the annual disclosure of the methods and significant assumptions used to estimate the fair value of items for which the fair value option has been elected. This disclosure would not reflect the disclosure of the methodology and assumptions for items otherwise required to be reported at fair value and, therefore, for which the fair value option has not been elected or is not applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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