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Stock-Based Compensation - Additional Information (Detail)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 25, 2022
installment
$ / shares
shares
Dec. 17, 2021
installment
$ / shares
shares
Oct. 29, 2021
tranche
$ / shares
shares
Jun. 03, 2021
$ / shares
shares
Mar. 30, 2021
installment
$ / shares
shares
Jun. 04, 2020
$ / shares
Mar. 31, 2022
$ / shares
shares
Feb. 28, 2022
shares
Mar. 31, 2021
shares
Feb. 28, 2021
shares
Jun. 30, 2020
shares
Feb. 29, 2020
installment
$ / shares
shares
Mar. 31, 2022
USD ($)
$ / shares
shares
Mar. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2015
shares
Jan. 01, 2022
shares
Dec. 31, 2021
$ / shares
shares
Nov. 20, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Common stock, par value | $ / shares             $ 0.001           $ 0.001       $ 0.001  
Common stock, shares outstanding             53,591,225           53,591,225       53,480,812  
Common stock, shares issued             53,591,225           53,591,225       53,480,812  
Number of options outstanding             7,430,629   5,918,808       7,430,629 5,918,808        
Restricted Stock Units [Member] | Research and Development [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         $ 167 $ 568        
Restricted Stock Units [Member] | General and Administrative [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         $ 1,452 $ 822        
Share-based Payment Arrangement, Employee [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Fair value of options granted | $ / shares                         $ 7.55 $ 12.49        
Director [Member] | Restricted Stock Units [Member] | General and Administrative [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         $ 139 $ 139        
Non-employee Consultants [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Options granted                         0 0        
2019 Inducement Plan [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Common stock, par value | $ / shares                                   $ 0.001
Awarded                         0 0        
2019 Inducement Plan [Member] | Maximum [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Share-based compensation arrangement by share-based payment award, number of shares authorized                                   300,000
2019 Inducement Plan [Member] | Share-based Payment Arrangement, Employee [Member] | Share-Based Compensation Award, Tranche One [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Percentage of vested shares on first anniversary of grant date                         25.00%          
2019 Inducement Plan [Member] | Share-based Payment Arrangement, Employee [Member] | Share-based Compensation Award, Tranche Two [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted                         36 months          
2019 Inducement Plan [Member] | Share-based Payment Arrangement, Employee [Member] | Share Based Compensation Subsequent Awards [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted                         4 years          
2014 Equity Incentive Plan [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Number of stock options that may be granted after the tenth anniversary of the 2014 Plan                           0        
Annual increases in number of shares reserved for issuance as a percentage of shares of capital stock outstanding through January 1, 2024                             3.00%      
Share-based compensation arrangement by share-based payment award, number of shares authorized                               10,589,103 8,984,679  
Number of options outstanding             7,430,629           7,430,629       6,512,280  
Options granted                         977,438 673,200        
2014 Equity Incentive Plan [Member] | Maximum [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Term of awards granted                         10 years          
2014 Equity Incentive Plan [Member] | Maximum [Member] | Incentive Stock Options [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Share-based compensation arrangement by share-based payment award, number of shares authorized                             30,000,000      
2014 Equity Incentive Plan [Member] | Employees [Member] | Restricted Stock Units [Member] | February 2022 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         $ 0          
Restricted stock units, vested                         0          
2014 Equity Incentive Plan [Member] | Employees [Member] | Performance Restricted Stock Units [Member] | February 2022 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Awarded 243,000                                  
Restricted stock units, grant date fair value | $ / shares $ 10.46                                  
2014 Equity Incentive Plan [Member] | Employees [Member] | Performance Restricted Stock Units [Member] | March 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Awarded         176,000                          
Restricted stock units, grant date fair value | $ / shares         $ 20.59                          
Compensation expense | $                         $ 729          
Restricted stock units, vested               37,999         82,001          
Restricted stock units, Forfeited                         93,999          
2014 Equity Incentive Plan [Member] | Employees [Member] | Performance Restricted Stock Units [Member] | February 2020 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Awarded                       138,000            
Restricted stock units, grant date fair value | $ / shares                       $ 16.36            
Compensation expense | $                           $ 1,256        
Restricted stock units, vested                 40,000 36,750     113,500          
Restricted stock units, Forfeited                         24,500          
2014 Equity Incentive Plan [Member] | Employees [Member] | Performance Restricted Stock Units [Member] | Research and Development [Member] | February 2020 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                           524        
2014 Equity Incentive Plan [Member] | Employees [Member] | Performance Restricted Stock Units [Member] | General and Administrative [Member] | March 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         $ 303          
2014 Equity Incentive Plan [Member] | Employees [Member] | Performance Restricted Stock Units [Member] | General and Administrative [Member] | February 2020 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                           732        
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | February 2022 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted 3 years                                  
Awarded 145,170                                  
Restricted stock units, grant date fair value | $ / shares $ 10.46                                  
Number of equal installment | installment 3                                  
Compensation expense | $                         $ 50          
Restricted stock units, vested                         0          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | December 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted   18 months                                
Awarded   63,573                                
Restricted stock units, grant date fair value | $ / shares   $ 12.45                                
Number of equal installment | installment   2                                
Compensation expense | $                         $ 131          
Restricted stock units, vested                         0          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | March 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted         3 years                          
Awarded         100,000                          
Restricted stock units, grant date fair value | $ / shares         $ 20.59                          
Number of equal installment | installment         3                          
Compensation expense | $                         $ 284          
Restricted stock units, vested             33,336           33,336          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | February 2020 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted                       3 years            
Awarded                       98,000            
Restricted stock units, grant date fair value | $ / shares                       $ 16.36            
Number of equal installment | installment                       3            
Compensation expense | $                         $ 219 132        
Restricted stock units, vested               32,666   32,669     65,335          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | Research and Development [Member] | February 2022 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         $ 18          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | Research and Development [Member] | December 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         52          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | Research and Development [Member] | March 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         54          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | Research and Development [Member] | February 2020 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         43 43        
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | General and Administrative [Member] | Modified February 2020 Awards [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         155          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | General and Administrative [Member] | February 2022 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         32          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | General and Administrative [Member] | December 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         79          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | General and Administrative [Member] | October 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         203          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | General and Administrative [Member] | March 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         230          
2014 Equity Incentive Plan [Member] | Employees [Member] | Time-based Restricted Stock Units [Member] | General and Administrative [Member] | February 2020 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         $ 176 89        
2014 Equity Incentive Plan [Member] | Director [Member] | Incentive Stock Options [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted                         3 years          
2014 Equity Incentive Plan [Member] | Director [Member] | Share-based Payment Arrangement, Nonemployee [Member] | Restricted Stock Units [Member] | June 2020 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted                     1 year              
Awarded                     36,000              
Restricted stock units, grant date fair value | $ / shares           $ 15.62                        
Restricted stock units vesting date           Jun. 03, 2021                        
2014 Equity Incentive Plan [Member] | Director [Member] | Share-based Payment Arrangement, Nonemployee [Member] | Restricted Stock Units [Member] | General and Administrative [Member] | June 2020 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                           $ 139        
2014 Equity Incentive Plan [Member] | Chief Executive Officer [Member] | Time-based Restricted Stock Units [Member] | October 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Awarded     147,942                   147,942          
Restricted stock units, grant date fair value | $ / shares     $ 16.83                              
Number of restricted stock unit tranches | tranche     2                              
Compensation expense | $                         $ 206          
Restricted stock units, vested                         5,942          
2014 Equity Incentive Plan [Member] | Chief Executive Officer [Member] | Share-Based Compensation Award, Tranche One [Member] | Time-based Restricted Stock Units [Member] | October 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Percentage of vested shares on first anniversary of grant date     25.00%                              
Awarded     142,000                              
2014 Equity Incentive Plan [Member] | Chief Executive Officer [Member] | Share-based Compensation Award, Tranche Two [Member] | Time-based Restricted Stock Units [Member] | October 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted     36 months                              
Awarded     5,942                              
2014 Equity Incentive Plan [Member] | Employee And Nonemployee Consultants [Member] | Share-Based Compensation Award, Tranche One [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Percentage of vested shares on first anniversary of grant date                         25.00%          
2014 Equity Incentive Plan [Member] | Employee And Nonemployee Consultants [Member] | Share-based Compensation Award, Tranche Two [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted                         36 months          
2014 Equity Incentive Plan [Member] | Employee And Nonemployee Consultants [Member] | Share Based Compensation Subsequent Awards [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted                         4 years          
2014 Equity Incentive Plan [Member] | Non-employee Directors [Member] | Restricted Stock Units [Member] | June 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Vesting period of awards granted       1 year                            
Awarded       43,200                            
Restricted stock units, grant date fair value | $ / shares       $ 13.06                            
Restricted stock units, vested                         0          
2014 Equity Incentive Plan [Member] | Non-employee Directors [Member] | Restricted Stock Units [Member] | General and Administrative [Member] | June 2021 [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Compensation expense | $                         $ 139          
2014 Equity Incentive Plan [Member] | Employees And Non-Employee Members Of Board Of Directors [Member] | Restricted Stock Units [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                    
Awarded                         388,170          
Restricted stock units, grant date fair value | $ / shares                         $ 10.46          
Restricted stock units, vested                         109,943          
Restricted stock units, Forfeited                         118,499