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Stock-Based Compensation - Additional Information (Detail)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 01, 2023
$ / shares
shares
Oct. 12, 2022
$ / shares
shares
Jun. 02, 2022
$ / shares
shares
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
Mar. 31, 2023
$ / shares
shares
Feb. 28, 2023
shares
Jan. 31, 2023
shares
Mar. 31, 2022
shares
Feb. 28, 2022
shares
Feb. 29, 2020
installment
$ / shares
shares
Mar. 31, 2023
USD ($)
$ / shares
shares
Mar. 31, 2022
USD ($)
$ / shares
shares
Dec. 31, 2015
shares
Jan. 01, 2023
shares
Dec. 31, 2022
$ / 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                 53,974,352           53,974,352       53,797,341  
Common stock, shares issued                 53,974,352           53,974,352       53,797,341  
Number of restricted stock units outstanding                 695,720     736,272     695,720 736,272        
Number of options outstanding                 8,992,759     7,430,629     8,992,759 7,430,629     7,689,449  
Options granted                             1,449,154          
Employees [Member] | Restricted Stock Units [Member] | Research and Development [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Compensation expense | $                             $ 179 $ 167        
Employees [Member] | Restricted Stock Units [Member] | General and Administrative [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Compensation expense | $                             330 1,452        
Director [Member] | Restricted Stock Units [Member] | General and Administrative [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Compensation expense | $                             $ 123 $ 139        
Non-employee Consultants [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Options granted                             0 0        
Employees And Non-Employee Members Of Board Of Directors [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Fair value of options granted | $ / shares                               $ 7.55        
Employees And Non-Employee Members Of Board Of Directors [Member] | Share-based Payment Arrangement, Employee [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Fair value of options granted | $ / shares                             $ 7.08          
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                                       300,000,000
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 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                                   12,203,023 10,589,103  
Options granted                             1,449,154 977,438        
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] | 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 | $                             $ 0 $ 729        
Restricted stock units, vested                         37,999              
Number of restricted stock units outstanding                 0           0          
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]                                        
Number of restricted stock units outstanding                 0           0          
2014 Equity Incentive Plan [Member] | Employees [Member] | Performance Restricted Stock Units [Member] | March 2023 [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Awarded 407,000                           407,000          
Restricted stock units, grant date fair value | $ / shares $ 10.06                                      
Compensation expense | $                             $ 0          
2014 Equity Incentive Plan [Member] | Employees [Member] | Performance Restricted Stock Units [Member] | General and Administrative [Member] | Modified November 2021 Awards [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Compensation expense | $                               303        
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 | $                             $ 114 50        
Restricted stock units, vested                   42,920                    
Number of restricted stock units outstanding                 82,250           82,250          
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 | $                             $ 108 131        
Restricted stock units, vested                             26,199          
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 | $                             $ 81 284        
Restricted stock units, vested                       33,336     15,999          
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 | $                             $ 39 219        
Restricted stock units, vested                         32,666              
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 | $                             47 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 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 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 | $                             26 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] | Modified November 2021 Awards [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] | February 2022 [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Compensation expense | $                             67 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 | $                             56 79        
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 | $                             27 230        
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 | $                             $ 13 176        
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] | Executive Officers [Member] | Time-based Restricted Stock Units [Member] | October 2022 [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Awarded   7,267                                    
Restricted stock units, grant date fair value | $ / shares   $ 9.42                                    
Number of restricted stock units outstanding                 7,267           7,267          
2014 Equity Incentive Plan [Member] | Executive Officers [Member] | Time-based Restricted Stock Units [Member] | March 2021 [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Restricted stock units, vested                 15,999                      
2014 Equity Incentive Plan [Member] | Executive Officers [Member] | Time-based Restricted Stock Units [Member] | February 2020 [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Restricted stock units, vested                   15,999                    
2014 Equity Incentive Plan [Member] | Executive Officers [Member] | Time-based Restricted Stock Units [Member] | General and Administrative [Member] | October 2022 [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Compensation expense | $                             $ 19          
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                            
Restricted stock units, grant date fair value | $ / shares           $ 16.83                            
Number of restricted stock unit tranches | tranche           2                            
Restricted stock units, vested                     8,875                  
Number of restricted stock units outstanding                 97,625           97,625          
2014 Equity Incentive Plan [Member] | Chief Executive Officer [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 | $                             $ 147 $ 206        
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%                            
Vesting period of awards granted           36 months                            
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]                                        
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 2022 [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Vesting period of awards granted     1 year                                  
Awarded     59,380                                  
Restricted stock units, grant date fair value | $ / shares     $ 8.42                                  
Number of restricted stock units outstanding                 59,380           59,380          
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                          
Compensation expense | $                             $ 0          
Number of restricted stock units outstanding                 0           0          
2014 Equity Incentive Plan [Member] | Non-employee Directors [Member] | Restricted Stock Units [Member] | General and Administrative [Member] | June 2022 [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Compensation expense | $                             $ 123          
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                             407,000          
Restricted stock units, grant date fair value | $ / shares                             $ 10.06          
Restricted stock units, vested                             83,793          
Number of restricted stock units outstanding                 695,720           695,720       372,513