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Debt (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Less: debt-current $ (4,813) $ (5,017)
Debt-non-current 39,458 39,414
Term Loan Credit Agreement    
Debt Instrument [Line Items]    
Total debt, Principal 40,000 40,000
Total debt, Unamortized Discount (542) (586)
Total debt 39,458 39,414
Debt - non-current, Principal 40,000 40,000
Debt - non-current, Unamortized Discount (542) (586)
Debt-non-current $ 39,458 $ 39,414