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Revenue - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Dec. 31, 2020
Sep. 30, 2020
Disaggregation Of Revenue [Line Items]      
Contract with customer liability   $ 0 $ 0
Accrued incentive fees as per the terms of investment management agreements   $ 9,200,000  
Minimum      
Disaggregation Of Revenue [Line Items]      
Incentive fee earned as percentage on investment performance   5.00%  
Equipment Lease Term   10 months  
Maximum      
Disaggregation Of Revenue [Line Items]      
Incentive fee earned as percentage on investment performance   20.00%  
Equipment Lease Term   36 months  
GECC      
Disaggregation Of Revenue [Line Items]      
Annual rate of base management fee earned as percentage of average adjusted gross assets   1.50%  
Equipment Sales | Accounts Receivable      
Disaggregation Of Revenue [Line Items]      
Unbilled revenue $ 1,200,000 $ 800,000  
Equipment Rental      
Disaggregation Of Revenue [Line Items]      
Contract with customer liability 1,300,000 1,000,000.0  
Equipment Rental | Accounts Receivable      
Disaggregation Of Revenue [Line Items]      
Unbilled revenue 700,000 $ 500,000  
Centers For Medicare And Medicaid Services      
Disaggregation Of Revenue [Line Items]      
Proceeds from federal agency $ 4,400,000