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Fair Value Measurements (Details) - USD ($)
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Asset impairments $ 0 $ 0 $ 0
Recurring      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Interest rate swap not designated as cash flow hedge 0    
Total assets at fair value 0    
Interest rate swap not designated as cash flow hedge   68,000  
Total liabilities at fair value   68,000  
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Interest rate swap not designated as cash flow hedge 0    
Total assets at fair value 0    
Interest rate swap not designated as cash flow hedge   0  
Total liabilities at fair value   0  
Recurring | Significant Other Observable Inputs (Level 2)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Interest rate swap not designated as cash flow hedge 0    
Total assets at fair value 0    
Interest rate swap not designated as cash flow hedge   68,000  
Total liabilities at fair value   68,000  
Recurring | Significant Unobservable Inputs (Level 3)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Interest rate swap not designated as cash flow hedge 0    
Total assets at fair value $ 0    
Interest rate swap not designated as cash flow hedge   0  
Total liabilities at fair value   $ 0