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Debt - Summary of Principal Outstanding and Unamortized Discount (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Debt Disclosure [Abstract]    
Term loan $ 15,000 $ 15,000
Discount and debt issuance costs on term loan (1,438) (1,534)
Total $ 13,562 $ 13,466