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Borrowings - Schedule of Amortization of Debt Premium and Accretion of Debt Discount and Debt Issuance Cost (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Debt Disclosure [Abstract]        
Amortization of debt discount $ 86 $ 90 $ 146 $ 179
Amortization of debt issuance cost $ 363 $ 27 $ 488 $ 55