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Credit Facilities (Narrative) (Details)
$ in Thousands
9 Months Ended
May 06, 2020
USD ($)
Jun. 30, 2020
USD ($)
LetterOfCredit
Jun. 30, 2019
USD ($)
Line of Credit Facility [Line Items]      
Proceeds From Pay Check Program   $ 6,488 $ 0
Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Long-term line of credit   0  
Standby letters of credit, total amount outstanding   500  
Remaining borrowing capacity   $ 3,500  
Revolving Credit Facility | LIBOR Rate Loan      
Line of Credit Facility [Line Items]      
Number of standby letters of credit outstanding | LetterOfCredit   1  
Revolving Credit Facility | Minimum      
Line of Credit Facility [Line Items]      
Liquidity requirement, minimum after specific uses   $ 25,000  
Liquidity requirement, minimum   10,000  
Excess availability requirement, minimum   1,000  
Revolving Credit Facility | Maximum | Tenth Amendment      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity   $ 15,000  
Paycheck Protection Program      
Line of Credit Facility [Line Items]      
Proceeds From Pay Check Program $ 6,500    
Fixed Interest Rate 1.00%    
Periodic Payment Due $ 273,160