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Collaborative Research, Development, and License Agreements - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Dec. 05, 2022
Feb. 22, 2022
Mar. 31, 2022
Jan. 31, 2022
May 31, 2011
Mar. 31, 2009
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Total Revenues   $ 1,500,000         $ 370,000 $ 1,500,000      
Licensing Agreements [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Amortization expense of licenses             $ 82,000 14,000      
Weighted average remaining amortization period for all licenses             2 years        
Annual amortization expense of licenses year 1             $ 3,000        
Annual amortization expense of licenses year 2             3,000        
Annual amortization expense of licenses year 3             3,000        
Annual amortization expense of licenses year 4             3,000        
Annual amortization expense of licenses year 5             3,000        
BICO Group AB [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Nonrefundable upfront fee paid   1,500,000                  
Total Revenues   $ 1,500,000         370,000        
University of Missouri [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Royalty fees percentage minimum           1.00%          
Royalty fees percentage maximum           3.00%          
Minimum annual royalty paid       $ 25,000              
Excess of minimum annual royalties payment     $ 0       0        
Upfront payment $ 50,000,000           $ 0        
University of Missouri [Member] | Sublicense Agreements [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Percentage of royalty revenue from sublicensee             3.00%        
Clemson University [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Minimum annual royalty paid             $ 40,000 $ 40,000      
Upfront payment             $ 0        
Minimum annual royalty payment due                 $ 40,000 $ 20,000 $ 20,000
Clemson University [Member] | Sublicense Agreements [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Percentage of royalty revenue from sublicensee             40.00%        
Clemson University [Member] | Licensing Agreements [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Royalty fees percentage minimum         1.50%            
Royalty fees percentage maximum         3.00%            
Expected expiration year of license agreement         2024-05            
Salk Institute for Biological Studies [Member] | Licensing Agreements [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Royalty fees percentage minimum             1.00%        
Royalty fees percentage maximum             1.125%        
Percentage of sublicensing revenue             3.50%        
Salk Institute for Biological Studies [Member] | Licensing Agreements [Member] | 45 days of Dosing of First Patient in a Phase III Clinical Trial [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Milestone payments             $ 500,000        
Salk Institute for Biological Studies [Member] | Licensing Agreements [Member] | 45 days of FDA Approval of First Licensed Product [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Milestone payments             1,000,000        
Salk Institute for Biological Studies [Member] | Licensing Agreements [Member] | 45 Days of First Commercial Sale of Licensed Product in Territory [Member]                      
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                      
Milestone payments             $ 1,500,000