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Summary of Stock Option Activity (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Shares, Granted |  | 675,000
2016 Stock Incentive Plan [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Shares Common stock options, outstanding at Beginning balance | 8,064,561 | 9,405,541
Weighted Average Exercise Price, outstanding at Beginning balance | $ 0.62 | $ 0.61
Weighted Average Remaining Contractual Life (in Years), outstanding at Beginning balance | 8 years 4 months 2 days | 9 years 3 months 18 days
Number of Shares, Exercised | (6,944) | (25,000)
Weighted Average Exercise Price, Exercised | $ 0.56 | $ 0.17
Number of Shares, Granted | 234,000 |
Weighted Average Exercise Price, Granted | $ 0.90 |
Number of Shares, Forfeited | (601,179) | (1,197,776)
Weighted Average Exercise Price, Forfeited | $ 1.09 | $ 0.73
Number of Shares, Expired | (788,101) | (118,204)
Weighted Average Exercise Price, Expired | $ 0.53 | $ 1.09
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance | 6,902,337 | 8,064,561
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance | $ 0.86 | $ 0.62
Weighted Average Remaining Contractual Life (in Years), outstanding at Ending balance | 7 years 6 months |
Number of Shares Common stock options, exercisable at Ending balance | 6,027,418 |
Weighted Average Exercise Price, exercisable at Ending balance | $ 0.90 |
Weighted Average Remaining Contractual Life (in Years), exercisable at Ending balance | 7 years 5 months 19 days |
Number of Shares Common stock options, not vested at Ending balance | 874,919 |
Number of Shares Common stock options, available for future grants at Ending balance | 3,097,663 |
Weighted Average Exercise Price, outstanding at Ending balance | $ 0.86 | $ 0.62
2019 Equity Incentive Plan [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Shares Common stock options, outstanding at Beginning balance | 65,013,645 |
Weighted Average Exercise Price, outstanding at Beginning balance | $ 0.53 |
Weighted Average Remaining Contractual Life (in Years), outstanding at Beginning balance |  |
Number of Shares, Granted | 25,393,768 | 68,180,863
Weighted Average Exercise Price, Granted | $ 0.71 | $ 0.53
Number of Shares, Forfeited | (8,342,377) | (3,167,218)
Weighted Average Exercise Price, Forfeited | $ 0.61 |
Number of Shares, Expired | (2,722) |
Weighted Average Exercise Price, Expired | $ 0.56 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance | 82,062,314 | 65,013,645
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance | $ 0.58 | $ 0.53
Weighted Average Remaining Contractual Life (in Years), outstanding at Ending balance | 8 years 7 months 24 days | 9 years 5 months 4 days
Number of Shares Common stock options, exercisable at Ending balance | 13,608,686 |
Weighted Average Exercise Price, exercisable at Ending balance | $ 0.54 |
Weighted Average Remaining Contractual Life (in Years), exercisable at Ending balance | 8 years 5 months 26 days |
Number of Shares Common stock options, not vested at Ending balance | 68,453,628 |
Number of Shares Common stock options, available for future grants at Ending balance | 2,937,686 |
Weighted Average Exercise Price, outstanding at Ending balance | $ 0.58 | $ 0.53
Stock Options Outside 2016 Plan and 2019 Plan [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Shares Common stock options, outstanding at Beginning balance | 3,724,667 | 2,414,000
Weighted Average Exercise Price, outstanding at Beginning balance | $ 0.21 | $ 0.36
Weighted Average Remaining Contractual Life (in Years), outstanding at Beginning balance |  | 9 years 11 months 8 days
Number of Shares, Exercised |  | (2,000)
Weighted Average Exercise Price, Exercised |  | $ 0.35
Number of Shares, Granted |  | 1,500,000
Weighted Average Exercise Price, Granted |  | $ 0.57
Number of Shares, Forfeited | (195,333) | (180,000)
Weighted Average Exercise Price, Forfeited | $ 0.46 | $ 0.35
Number of Shares, Expired | (477,334) | (7,333)
Weighted Average Exercise Price, Expired | $ 0.39 | $ 0.35
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance | 3,052,000 | 3,724,667
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance | $ 0.46 | $ 0.21
Weighted Average Remaining Contractual Life (in Years), outstanding at Ending balance | 8 years 25 days | 9 years 14 days
Number of Shares Common stock options, exercisable at Ending balance | 2,376,333 |
Weighted Average Exercise Price, exercisable at Ending balance | $ 0.43 |
Weighted Average Remaining Contractual Life (in Years), exercisable at Ending balance | 6 years 2 months 12 days |
Number of Shares Common stock options, not vested at Ending balance | 675,667 |
Weighted Average Exercise Price, outstanding at Ending balance | $ 0.46 | $ 0.21

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