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Concentration of Credit Risk and Significant Customers (Details)
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Minimum      
Concentration Risk      
Terms of credit sales, (in days) 30 days    
Maximum      
Concentration Risk      
Terms of credit sales, (in days) 60 days    
Customer A [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member]      
Concentration Risk      
Customers greater than 10% of total 28.80% 28.30% 26.90%
Customer A [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Concentration Risk      
Customers greater than 10% of total 12.10% 17.10%  
Customer B [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member]      
Concentration Risk      
Customers greater than 10% of total 36.40% 35.20% 35.80%
Customer B [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Concentration Risk      
Customers greater than 10% of total 19.70% 35.50%  
Customer C [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member]      
Concentration Risk      
Customers greater than 10% of total     10.60%
Customer C [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Concentration Risk      
Customers greater than 10% of total 18.10% 10.60%  
Customer D [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Concentration Risk      
Customers greater than 10% of total 13.30%