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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jan. 01, 2022
Jun. 16, 2021
Mar. 28, 2018
Mar. 27, 2018
Jun. 30, 2022
Dec. 31, 2021
Jul. 31, 2022
Jan. 31, 2022
Nov. 05, 2020
Oct. 22, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Common stock shares issued         65,707,714 43,805,922        
2020 Inducement Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares available for issuance         728,995          
Shares reserved for future issuance                 3,750,000 3,750,000
Stock Option [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Unrecognized compensation cost         $ 51.6          
Unrecognized compensation expenses, recognition period         2 years 11 months 8 days          
2018 Stock Option and Incentive Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of increases in authorized shares       700,180            
Percentage applied to the outstanding shares as annual increase in the number of shares authorized for issuance       4.00%            
Increased in authorized shares reserved for issuance 1,752,237 6,000,000                
Shares available for issuance         1,109,373          
2018 Stock Option and Incentive Plan [Member] | Employees and Non-employee Directors [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Option grants           3,402,768        
2018 Employee Stock Purchase Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Increased in authorized shares reserved for issuance 125,000                  
Shares available for issuance         442,924          
Shares reserved for future issuance     78,500              
2018 Employee Stock Purchase Plan [Member] | Maximum [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of increases in authorized shares     125,000              
Percentage of shares of common stock available for issuance     1.00%              
2018 Employee Stock Purchase Plan [Member] | Employees [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Common stock shares issued               18,995    
2018 Employee Stock Purchase Plan [Member] | Employees [Member] | Subsequent Event [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Common stock shares issued             30,005