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Stockholders' Equity - Equity Financings - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Dec. 31, 2020
Nov. 30, 2021
Feb. 28, 2021
Aug. 31, 2020
Feb. 29, 2020
Dec. 31, 2021
Dec. 31, 2020
Jun. 23, 2020
Jun. 22, 2020
Class Of Stock [Line Items]                  
Common stock, shares authorized 300,000,000         300,000,000 300,000,000 300,000,000  
Equity Financings [Member]                  
Class Of Stock [Line Items]                  
Common stock, shares authorized                 150,000,000
Equity Financings [Member] | Share Offering [Member]                  
Class Of Stock [Line Items]                  
Common stock issued   5,122,273 10,465,000   1,500,000        
Common stock, additional shares issued   1,095,000 1,365,000            
Pre-funded warrants issued to purchase common stock shares   3,272,727              
Price per share   $ 13.75 $ 11.00   $ 14.50        
Pre-funded warrants issued, price per share   $ 13.74              
Gross proceeds from issuance of common stock   $ 115,400,000 $ 115,100,000   $ 21,750,000        
Share issuance costs   $ 7,200,000 $ 7,200,000   $ 1,800,000        
Share Purchase Agreement [Member]                  
Class Of Stock [Line Items]                  
Common stock issued 3,010,722                
Price per share $ 5.22           $ 5.22    
Gross proceeds from issuance of common stock $ 15,700,000                
Share issuance costs $ 100,000                
At-the-Market Offering [Member]                  
Class Of Stock [Line Items]                  
Common stock issued           48,538 2,590,093    
Price per share $ 5.74         $ 11.37 $ 5.74    
Gross proceeds from issuance of common stock           $ 552,000 $ 14,900,000    
Share issuance costs           $ 53,000 $ 646,000    
Stock issuances, sales agent commission maximum percentage       3.00%