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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2019
Stock options | Omnibus Incentive Plan 2014 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of shares available for future grant |
|  | Shares Available for Grant |
Available as of December 31, 2018 |  |  | 9,142,273 |
Share pool increase |  |  | 4,898,750 |
Forfeited |  |  | 153,125 |
Cancelled |  |  | 196,875 |
Granted |  |  | (1,262,642 | )
Available as of December 31, 2019 |  |  | 13,128,381 |
Schedule of summary of stock option activity |
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (Years) |  |  | Aggregate Intrinsic Value* |
Outstanding, December 31, 2018 |  |  | 2,405,000 |  |  | $ | 0.33 |  |  |  | 8.71 |  |  |  |
Granted |  |  | 1,262,642 |  |  |  | 0.30 |  |  |  |  |  |  |  |
Cancelled |  |  | (196,875 | ) |  |  | 0.26 |  |  |  |  |  |  |  |
Forfeited |  |  | (153,125 | ) |  |  | 0.26 |  |  |  |  |  |  |  |
Outstanding, December 31, 2019 |  |  | 3,317,642 |  |  | $ | 0.33 |  |  |  | 8.34 |  |  | $ | — |
Exercisable, December 31, 2019 |  |  | 2,399,356 |  |  | $ | 0.34 |  |  |  | 7.84 |  |  | $ | — |
Vested and expected to vest, December 31, 2019 |  |  | 3,317,642 |  |  | $ | 0.33 |  |  |  | 8.34 |  |  | $ | — |
*The aggregate intrinsic value is the sum of the amounts by which the quoted market price of the Company’s stock exceeded the exercise price of the stock options at December 31, 2019 for those stock options for which the quoted market price was in excess of the exercise price (“in-the-money options”).
Schedule of fair value assumptions of stock option granted |
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |
Dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
Risk-free interest rate |  |  | 1.49 | % |  |  | 3.06—3.10 | %
Expected term (years) |  |  | 5.65 |  |  |  | 5.27—5.58 |
Volatility |  |  | 93.72 | % |  |  | 70.00—93.60 | %
Stock options | Awards Granted Outside the 2014 Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of fair value assumptions of stock option granted |
|  |  | At Issuance |
Dividend Yield |  |  | 0.00 | %
Risk-free interest rate |  |  | 2.79 | %
Expected term (in years) |  |  | 5.54 |
Volatility |  |  | 70 | %
Restricted Stock Awards | Awards Granted Outside the 2014 Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of RSA activity |
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Unvested, December 31, 2018 |  |  | 900,000 |  |  | $ | 0.19 |
Granted |  |  | — |  |  |  | — |
Released |  |  | (450,000 | ) |  |  | 0.19 |
Unvested, December 31, 2019 |  |  | 450,000 |  |  | $ | 0.19 |

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