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Credit Facility (Detail Textuals) - USD ($)
6 Months Ended
Mar. 29, 2019
Feb. 12, 2019
Sep. 30, 2019
Dec. 31, 2019
Mar. 31, 2019
Feb. 28, 2019
Jan. 31, 2019
Mar. 31, 2018
Line Of Credit Facility [Line Items]                
Line of credit facility utilized     $ 119,500,000   $ 145,000,000      
Interest coverage ratio description     The minimum interest coverage ratio to 0.44 to 1.0 for the measurement period ended on December 31, 2019, 0.2 to 1.0 for the measurement period ended January 31, 2019, and 1.0 to 1.0 for the measurement period ended February 28, 2019 and thereafter          
Aggregate amount available under the line of credit   $ 140,000,000            
Minimum interest coverage ratio           1.00% 0.20%  
Scenario, Forecast [Member]                
Line Of Credit Facility [Line Items]                
Minimum interest coverage ratio       0.44%        
Minimum                
Line Of Credit Facility [Line Items]                
Line of credit facility utilized         140,000,000     $ 140,000,000
Maximum                
Line Of Credit Facility [Line Items]                
Line of credit facility utilized         $ 225,000,000     $ 225,000,000
Senior Secured Credit Facility                
Line Of Credit Facility [Line Items]                
Line of credit facility amount $ 175,000,000              
Debt instrument description of variable rate basis     outstanding advances under the Credit Facility will accrue interest at a rate of LIBOR          
Debt Instrument, Basis Spread on Variable Rate 3.75%              
Commitment period for advances under Credit Facility 3 years              
Amortization period over which outstanding balance of credit facility is paid off 4 years              
Senior Secured Credit Facility | Maximum                
Line Of Credit Facility [Line Items]                
Credit Facility available as percentage of value of non-delinquent receivables 82.50%              
Percentage of borrowers obligation under credit agreement 10.00%