Quarterly report pursuant to Section 13 or 15(d)

Nature of Business, Basis of Presentation and Going Concern Uncertainty - Additional Information (Detail)

v3.23.2
Nature of Business, Basis of Presentation and Going Concern Uncertainty - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Apr. 26, 2022
Dec. 22, 2021
Nature Of Business And Basis Of Presentation [LineItems]                  
Accumulated deficit $ (153,167,000)       $ (153,167,000)   $ (135,936,000)    
Net loss (8,239,000) $ (8,992,000) $ (10,468,000) $ (7,573,000) (17,231,000) $ (18,041,000)      
Cash and cash equivalents 25,071,000       25,071,000   24,771,000    
Working capital 22,900,000       22,900,000        
Net cash used in operating activities         14,979,000 $ 15,119,000      
Convertible debt principal amount 15,000,000       $ 15,000,000   $ 15,000,000    
SVB [Member] | Contingent Convertible Debt Agreement [Member]                  
Nature Of Business And Basis Of Presentation [LineItems]                  
Convertible debt principal amount                 $ 25,000,000
SVB [Member] | Contingent Convertible Debt Agreement [Member] | Non-Convertible Term Loans [Member]                  
Nature Of Business And Basis Of Presentation [LineItems]                  
Convertible debt principal amount               $ 10,000,000  
Loan agreement expiration date         Apr. 30, 2023        
Loan amount drawn $ 0       $ 0