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Senior Debt - Summary of Debt (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Total outstanding borrowings under the Credit Facility $ 67,470 $ 72,616
Less: current portion (3,750) (3,125)
Debt, less current portion 63,720 69,491
Term Loan [Member]    
Debt Instrument [Line Items]    
Total outstanding borrowings under the Credit Facility 45,000 46,250
Revolving Credit Loan [Member]    
Debt Instrument [Line Items]    
Revolving Credit Loan 23,600 27,700
Term Debt [Member]    
Debt Instrument [Line Items]    
Unamortized debt discount $ (1,130) $ (1,334)