Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements (Note Payable) (Details)

v3.19.1
Financing Agreements (Note Payable) (Details) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2019
Mar. 31, 2019
Jun. 30, 2019
Sep. 14, 2018
Variable Interest Entity, Primary Beneficiary        
Debt Instrument [Line Items]        
Financing receivable $ 10,000,000 $ 10,000,000    
AMCF        
Debt Instrument [Line Items]        
Unamortized discount $ 3,300,000 $ 3,300,000    
Percentage of total expense recognized 33.80% 25.20%    
AMCF | Senior Subordinated Notes        
Debt Instrument [Line Items]        
Weighted average effective interest rate (in percentage) 5.88% 5.88%    
AMCF | Senior Subordinated Notes | Secured Senior Term Notes, Series 2018-1, Class A        
Debt Instrument [Line Items]        
Debt instrument, face amount       $ 72,000,000
Stated interest rate (in percentage)       4.98%
AMCF | Senior Subordinated Notes | Secured Senior Term Notes, Series 2018-1, Class B        
Debt Instrument [Line Items]        
Debt instrument, face amount       $ 28,000,000
Stated interest rate (in percentage)       5.98%
AMCF | Notes Receivable        
Debt Instrument [Line Items]        
Financing receivable $ 10,000,000 $ 10,000,000    
AMCF | Variable Interest Entity, Primary Beneficiary        
Debt Instrument [Line Items]        
Notes payable 86,700,000 86,700,000    
Interest payable $ 234,000 234,000    
Debt instrument, aggregate interest rate (percentage) 5.26%      
Interest expense, notes payable $ 1,433,000 $ 3,132,000    
AMCF | Subsequent Event | Notes Receivable        
Debt Instrument [Line Items]        
Financing receivable     $ 5,000,000