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Long Term Debt - Summary of Future Principal Payments, Including in Kind Interest (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Total debt, net $ 480,621 $ 425,419
Kind Interest    
Debt Instrument [Line Items]    
2020 17,000  
2021 17,000  
2022 272,000  
2024 277,287  
Total debt, net $ 583,287