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Net Loss per Share (Tables)
3 Months Ended
Mar. 31, 2022
Earnings Per Share [Abstract]  
Anti-Dilutive Securities Excluded from Calculation of Diluted Net Loss per Share The shares in the table below were excluded from the calculation of diluted net loss per share, prior to the use of the treasury stock method, due to their anti-dilutive effect:
 As of March 31,
 20222021
Warrant— 509,611 
Outstanding stock options14,187,899 11,369,546 
Unvested restricted stock units5,782,635 6,523,240 
Total19,970,534 18,402,397