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Stock-Based Compensation - Additional Information (Detail)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jan. 01, 2025
shares
May 25, 2024
shares
Mar. 28, 2018
shares
Mar. 27, 2018
shares
Jul. 31, 2025
shares
Feb. 28, 2023
shares
Jun. 30, 2025
USD ($)
Milestone
shares
Jun. 30, 2025
USD ($)
Milestone
shares
Jun. 30, 2024
USD ($)
Dec. 31, 2024
shares
Aug. 31, 2024
shares
Nov. 05, 2020
shares
Oct. 22, 2020
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Common stock shares issued             113,928,492 113,928,492   110,461,729      
Stock-based compensation expense | $               $ 19,724 $ 19,405        
Number of research performance milestones | Milestone             1 1          
Number of development performance milestones to be probable of achievement | Milestone             0 0          
Number of development performance milestones | Milestone             3 3          
Maximum [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Incremental stock compensation expense | $               $ 900          
Time Based Stock Options [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Unrecognized compensation cost | $             $ 63,800 $ 63,800          
Unrecognized compensation expenses, recognition period               2 years 8 months 26 days          
Time Based Restricted Stock Unit [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Unrecognized compensation cost | $             100 $ 100          
Unrecognized compensation expenses, recognition period               2 months 1 day          
Unvested PSUs [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Unrecognized compensation cost | $             $ 6,200 $ 6,200          
Unrecognized compensation expenses, recognition period               7 months 6 days          
Percentage of Share Based Compensation Nonvested Awards Stock Maximum Achievement               200.00%          
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%                  
Number of shares additionally granted           214,000              
Increased in authorized shares reserved for issuance 4,418,469     6,000,000       6,000,000          
Shares available for issuance             1,611,061 1,611,061          
Expiration period           3 years              
2018 Stock Option and Incentive Plan [Member] | Minimum [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Percentage of vesting of award           0.00%              
2018 Stock Option and Incentive Plan [Member] | Maximum [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Number of shares grants           2,500,000              
Percentage of vesting of award           200.00%              
2018 Stock Option and Incentive Plan [Member] | Performance-based Restricted Stock Units [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Number of shares grants               340,000          
Compensation expense recognized | $             $ 0 $ 0          
2020 Inducement Plan [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares available for issuance             859,445 859,445          
Shares reserved for future issuance                       3,750,000 3,750,000
2020 Inducement Plan [Member] | Chief Commercial Officer [Member] | Maximum [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares reserved for future issuance                     739,000    
2020 Inducement Plan [Member] | Nonqualified Options [Member] | Chief Commercial Officer [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Options to purchase number of common shares   525,000                      
Expiration period   10 years                      
Vesting term               4-year vesting schedule with 25% vesting on the 1-year anniversary of the grant date and the remainder vesting in equal monthly installments over the subsequent 36 months          
Vesting period   4 years                      
2020 Inducement Plan [Member] | Nonqualified Options [Member] | 1-year Anniversary of Grant Date [Member] | Chief Commercial Officer [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Percentage of vesting of award   25.00%                      
2020 Inducement Plan [Member] | Unvested PSUs [Member] | Chief Commercial Officer [Member] | Maximum [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Number of shares grants   214,000                      
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             428,356 428,356          
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] | Subsequent Event [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Shares issued         125,623