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Debt - Long term debt and the unamortized discount (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
May 31, 2021
Outstanding principal amount $ 30,709 $ 27,000  
Add: accreted liability of final payment fee 407 125  
Less: unamortized debt discount, long term (990) (1,618) $ (2,800)
Less: current portion of long term debt-principal (9,491) (1,291)  
Debt—net of current portion 20,635 24,216  
Current portion of long term debt—principal 9,491 1,291  
Less: current portion of unamortized debt discount (1,188) (716)  
Debt—current portion $ 8,303 $ 575