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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 8 Months Ended 9 Months Ended
Feb. 08, 2022
Jan. 21, 2020
Aug. 31, 2020
Jun. 30, 2020
Mar. 31, 2022
Mar. 31, 2021
Feb. 28, 2021
Sep. 30, 2021
Dec. 31, 2021
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of common stock shares reserved for issuance         15,849,373       17,205,249  
Total stock-based compensation         $ 3,332 $ 2,931        
Share Based Compensation Arrangement Modification [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Compensation costs relating to vesting acceleration and modification         400          
Contract Option [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Compensation costs relating to vesting acceleration and modification         $ 300          
Performance Options [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Executives and employees stock options granted     1,107,250              
Options vested         257,255          
Total stock-based compensation         $ 500 $ 800        
Total unrecognized stock-based compensation related to unvested stock options         4,700          
Service Vesting Shares [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Total unrecognized stock-based compensation related to unvested stock options         $ 43,400          
Weighted-average period               3 years 2 months 12 days    
2018 Equity Inducement Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of common stock shares reserved for issuance         1,037,500         37,500
Common shares authorized to be issued during the period 500,000     500,000     1,000,000      
Stock option life in years         10 years          
2015 Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of common stock shares reserved for issuance         5,747,273          
Common shares authorized to be issued during the period   4,312,500                
Stock option life in years         10 years          
Percentage threshold of outstanding shares increased annually under the plan         4.00%          
Stock option grants description         the number of shares equal to 4% of the total outstanding shares of the Company’s common stock as of the immediately preceding December 31.          
2008 Plan, 2015 Plan and 2018 Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Common shares authorized to be issued during the period         1,122,866          
Weighted-average grant date fair values of options granted         $ 22.06 $ 11.73        
Aggregate intrinsic value of options exercised         $ 5,000 $ 100        
Total grant date fair value of options vested         $ 5,700 $ 3,400