Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.1
Nature of Business, Basis of Presentation and Going Concern Uncertainty - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Apr. 26, 2022
Dec. 22, 2021
Nature Of Business And Basis Of Presentation [LineItems]          
Accumulated deficit $ (144,928,000)   $ (135,936,000)    
Net loss (8,992,000) $ (7,573,000)      
Cash and cash equivalents 16,514,000   24,771,000    
Working capital 2,100,000        
Net cash used in operating activities 8,303,000 $ 6,779,000      
Convertible debt principal amount 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         $ 25,000,000.0
SVB [Member] | Contingent Convertible Debt Agreement [Member] | Non-Convertible Term Loans [Member]          
Nature Of Business And Basis Of Presentation [LineItems]          
Available loan amount $ 10,000,000.0        
Convertible debt principal amount       $ 10,000,000.0  
Loan agreement expiration date Apr. 30, 2023        
Loan amount drawn $ 0