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US Government Contract - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Jun. 30, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Sep. 30, 2019
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                    
Revenue       $ 1,964,000 $ 5,911,000   $ 4,042,000 $ 13,145,000    
Contribution [Member]                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                    
Revenue         3,352,000   423,000 6,742,000    
Co Development Partnership Agreement [Member] | Biomedical Advanced Research and Development Authority [Member]                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                    
Initial value of consideration receivable                   $ 6,000,000.0
First contract option value exercised     $ 10,500,000              
Option contract value exercised   $ 6,400,000                
Collaborative arrangement additional funding amount received           $ 4,400,000        
Collaborative arrangement additional funding amount to be received $ 3,700,000                  
Unbilled accounts receivable       0     0   $ 700,000  
Co Development Partnership Agreement [Member] | Biomedical Advanced Research and Development Authority [Member] | Contribution [Member]                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                    
Revenue       $ 0 $ 3,400,000   $ 400,000 $ 6,700,000    
Co Development Partnership Agreement [Member] | Biomedical Advanced Research and Development Authority [Member] | Maximum [Member]                    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]                    
Aggregate consideration receivable                   $ 62,000,000.0