Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Options - Narratives (Details)

v3.21.1
Stock-based Compensation - Options - Narratives (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Common stock, shares issued 235,753,000 108,838,000
Common stock, shares outstanding 235,753,000 108,838,000
Options outstanding 324 1,512
Vesting period 4 years  
Options to purchase common shares    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Liability related to unvested awards $ 0.2 $ 0.1
Unvested options exercised 421,097  
Common stock, shares issued 235,753,437  
Shares issued upon early exercise of share options that remain unvested. 5,279,906  
Options outstanding 324,298  
Unvested options outstanding 203,177  
Vesting period 3 years  
Intrinsic value of options exercised $ 0.1 3.3
Total grant date fair value of share options granted $ 0.1 $ 3.5
Weighted average grant date fair value per share of options $ 0.44 $ 0.39
Share-based compensation expense $ 0.9 $ 0.3
Total unrecognized compensation cost related to options $ 2.0 $ 3.2
Period of recognition, unrecognized compensation cost 1 year 8 months 12 days 2 years 9 months 18 days
Options to purchase common shares | Research and development expense    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 0.7 $ 0.1
Options to purchase common shares | Selling, General and Administrative Expenses [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 0.2 $ 0.2