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Debt - Future Minimum Principal Payments Under New Credit Facility (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Total long-term debt, net $ 96,573 $ 94,962
Secured Promissory Notes    
Debt Instrument [Line Items]    
2021 14,286  
2022 34,286  
2023 34,286  
2024 17,142  
Total long-term debt, net $ 100,000