Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Potential Common Shares Excluded from Computation of Diluted Loss Per Share (Details)

v3.21.2
Summary of Significant Accounting Policies - Potential Common Shares Excluded from Computation of Diluted Loss Per Share (Details) - shares
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential common shares excluded from diluted loss per share 30,658,000 21,252,000 30,658,000 21,252,000
Stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential common shares excluded from diluted loss per share 24,118,000 21,252,000 24,118,000 21,252,000
Unvested restricted stock units        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential common shares excluded from diluted loss per share 610,000 0 610,000 0
Outstanding shares of Series A Preferred Stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential common shares excluded from diluted loss per share 5,430,000 0 5,430,000 0
Unvested restricted Series A Preferred Stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential common shares excluded from diluted loss per share 500,000 0 500,000 0