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v3.19.1

Stockholders' Equity (Details 2) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Stockholders' Equity [Abstract] |  |
Risk-free interest rate | 2.60% | 1.90%
Dividend yield | 0.00% | 0.00%
Expected volatility | 56.00% | 61.00%
Expected life | 5 years 4 months 24 days | 6 years 6 months

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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. + References No definition available. + Details
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- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References No definition available. + Details
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- Definition Risk-free interest rate assumption used in valuing an instrument. + References No definition available. + Details
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- References No definition available. + Details
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