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v3.19.3

Stockholders' Equity (Details 2) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Equity [Abstract] |  |  |  |
Risk-free interest rate |  | 2.90% | 2.20% | 2.60%
Dividend yield | 0.00% | 0.00% | 0.00% | 0.00%
Expected volatility |  | 55.00% | 52.00% | 57.00%
Expected life |  | 6 years 6 months | 5 years 3 months 19 days | 5 years 4 months 24 days

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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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- References No definition available. + Details
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