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Long-Term Debt - Paycheck Protection (Details) - USD ($)
9 Months Ended
Mar. 31, 2021
Jun. 30, 2020
Long-term debt    
Term of loan (in years) 2 years  
Revolver agreement    
Long-term debt    
Revolving credit loan facility, maximum borrowing capacity $ 11,000,000  
Third Amended and Restated Credit Agreement    
Long-term debt    
Percentage of common stock of foreign subsidiaries pledged as collateral 65.00%  
Third Amended and Restated Credit Agreement | Variable Interest Rate Option One | Minimum    
Long-term debt    
Interest rate over the reference rate 1.15%  
Third Amended and Restated Credit Agreement | Variable Interest Rate Option One | Maximum    
Long-term debt    
Interest rate over the reference rate 2.00%  
Third Amended and Restated Credit Agreement | Variable Interest Rate Option Two    
Long-term debt    
Interest rate over the reference rate 0.25%  
Paycheck Protection Program    
Long-term debt    
Term loan $ 3,904,000  
Aggregate principal amount   $ 3,904,000