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Fair Value Measurements (Details) - USD ($)
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
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 68,000    
Total assets at fair value 68,000    
Interest rate swap not designated as cash flow hedge   418,000  
Total liabilities at fair value   418,000  
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 68,000    
Total assets at fair value 68,000    
Interest rate swap not designated as cash flow hedge   418,000  
Total liabilities at fair value   418,000  
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