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Borrowings - Schedule of Maturities of Our Borrowings (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
2020 $ 5,262  
2021 4,444  
2022 13,333  
2023 13,333  
2024 83,940  
Total principal payments 120,312  
Unamortized discount (539)  
Debt issuance costs (874)  
Total debt — net carrying amount $ 118,899 $ 102,486