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Debt (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Less: current portion of term loan $ (4,950) $ (5,017)
Non-current portion of term loan 39,500 39,414
Term Loan Credit Agreement    
Debt Instrument [Line Items]    
Total term loan, Principal 40,000 40,000
Total term loan, Unamortized Discount (500) (586)
Total term loan 39,500 39,414
Non-current portion of term loan, Principal 40,000 40,000
Non-current portion of term loan, Unamortized Discount (500) (586)
Non-current portion of term loan $ 39,500 $ 39,414