Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Notes Payable - Additional Information (Details)

v3.21.2
Financing Agreements - Notes Payable - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended
Sep. 30, 2018
Sep. 30, 2021
Sep. 30, 2020
Variable Interest Entity, Primary Beneficiary      
Debt Instrument [Line Items]      
Financing receivable   $ 5,000,000.0  
AM Capital Funding, LLC.      
Debt Instrument [Line Items]      
Financing receivable $ 5,000,000.0    
Unamortized discount   $ 1,600,000  
Percentage of total expense recognized   26.30% 33.00%
AM Capital Funding, LLC. | Variable Interest Entity, Primary Beneficiary      
Debt Instrument [Line Items]      
Notes payable   $ 93,400,000  
Interest payable   $ 200,000  
Debt instrument, aggregate interest rate (percentage)   5.26%  
Interest expense   $ 1,400,000 $ 1,400,000
AM Capital Funding, LLC. | Secured Senior Term Notes, Series 2018-1, Class B      
Debt Instrument [Line Items]      
Financing receivable $ 5,000,000.0    
AM Capital Funding, LLC. | Senior Subordinated Notes      
Debt Instrument [Line Items]      
Debt instrument, maturity date Dec. 15, 2023    
Weighted average effective interest rate (in percentage)   5.88% 5.88%
AM Capital Funding, LLC. | Senior Subordinated Notes | Secured Senior Term Notes, Series 2018-1, Class A      
Debt Instrument [Line Items]      
Debt instrument, face amount $ 72,000,000.0 $ 72,000,000.0  
Stated interest rate (in percentage) 4.98% 4.98%  
AM Capital Funding, LLC. | Senior Subordinated Notes | Secured Senior Term Notes, Series 2018-1, Class B      
Debt Instrument [Line Items]      
Debt instrument, face amount $ 28,000,000.0 $ 28,000,000.0  
Stated interest rate (in percentage) 5.98% 5.98%