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Shareholders' Equity - Additional Information (Details) - USD ($)
 1 Months Ended 12 Months Ended
Nov. 01, 2021
Jun. 23, 2020
May 26, 2020
Jun. 30, 2020
May 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Jan. 01, 2022
Class Of Stock [Line Items]                
Convertible preferred shares term           The Company’s Series A and Series B convertible preferred shares were convertible on a one-to-one basis into common shares.    
Preferred stock shares authorized           Unlimited Unlimited  
Preferred stock shares issued           0 0  
Preferred stock shares outstanding           0 0  
Proceeds from issuance of warrant             $ 15,000,000  
Common stock voting rights           Each common share entitles the holder to one vote on all matters submitted to the shareholders for a vote.    
Cash dividends declared or paid           $ 0    
Net proceeds from issuance of common shares in initial public offering             $ 232,043,000  
Net proceeds from issuance of common shares           $ 94,288,000    
Common stock shares issued           41,850,162 36,902,924  
2020 Employee Share Purchase Plan                
Class Of Stock [Line Items]                
Shares issued, price per share           $ 28.46    
Shares of common stock reserved for future issuance               1,104,588
Annual increase in number of shares available for issuance as percentage of outstanding shares common stock on final day of preceding calendar year       1.00%        
Annual increase in number of shares available for issuance maximum number of common stock issued       3,300,000        
Purchase price of shares as percentage of fair market value of common stock on date of purchase       85.00%        
Common stock shares issued       0   9,943    
Maximum | 2020 Employee Share Purchase Plan                
Class Of Stock [Line Items]                
Shares of common stock reserved for future issuance       327,000        
Follow On Offering                
Class Of Stock [Line Items]                
Underwriting Commissions And Estimated Offering Expenses $ 800,000              
Affiliate of Bristol Myers Squibb                
Class Of Stock [Line Items]                
Proceeds from issuance of warrant     $ 15,000,000.0   $ 15,000,000.0      
Affiliate of Bristol Myers Squibb | Initial Public Offering                
Class Of Stock [Line Items]                
Warrant exercise price per share   $ 20.00            
Common Shares                
Class Of Stock [Line Items]                
Convertible preferred shares converted into common shares   21,558,393   21,558,393        
Shares issued upon exercise of warrants outstanding   750,000            
Shares issued           3,299    
Shares issued, price per share   $ 20.00            
Gross proceeds from IPO   $ 253,000,000            
Net proceeds from issuance of common shares in initial public offering   $ 232,043,000            
Common Shares | Initial Public Offering                
Class Of Stock [Line Items]                
Shares issued   12,650,000         12,650,000  
Common Shares | Exercise of Underwriters Option                
Class Of Stock [Line Items]                
Shares issued   1,650,000            
Common Shares | Exercise of Underwriters Option | Maximum                
Class Of Stock [Line Items]                
Shares issued 600,000 1,650,000            
Common Shares | Follow On Offering                
Class Of Stock [Line Items]                
Shares issued 4,600,000         4,600,000    
Shares issued, price per share $ 22.00              
Net proceeds from issuance of common shares $ 94,300,000              
Common Shares | Affiliate of Bristol Myers Squibb                
Class Of Stock [Line Items]                
Shares issued upon exercise of warrants outstanding   750,000