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Stockholders’ Equity (Tables)
3 Months Ended
Mar. 31, 2021
Equity [Abstract]  
Schedule of Common Stock Reserved for Future Issuance
Common stock reserved for future issuance consists of the following:
March 31,
2021
December 31,
2020
Shares available for grant under stock option plans4,262,364 1,646,518 
Options issued and outstanding under stock option plans3,560,541 2,594,597 
Unvested restricted stock units— 313,976 
Vested restricted stock units not yet settled2,045,634 1,731,658 
Convertible promissory note payable to CAA— 290,563 
Unit purchase options379,486 — 
Total common stock reserved for future issuance10,248,025 6,577,312