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Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Accrued Expenses [Line Items]    
Total accrued expenses $ 9,869  
QL Holdings LLC and Subsidiaries    
Accrued Expenses [Line Items]    
Accrued deferrable IPO costs and IPO expenses 8,140,000  
Accrued payroll and related expenses 3,397,000 $ 4,954,000
Accrued operating expenses 687,000 754,000
Other accrued expenses 427,000 824,000
Total accrued expenses $ 12,651,000 $ 6,532,000