Revenues (Schedule of Major Customers Accounting for 10% or More of Net Revenues and Accounts Receivable Balance) (Details) - Customer Concentration Risk	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Westcon Group Inc. | Net Revenue
Concentration Risk [Line Items]
Concentration risk (percent)	12.00%	14.00%	13.00%	14.00%
Westcon Group Inc. | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk (percent)			10.00%
Jenne Corporation | Net Revenue
Concentration Risk [Line Items]
Concentration risk (percent)	21.00%	13.00%	15.00%	11.00%
Jenne Corporation | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk (percent)			31.00%		13.00%
Tech Data Corporation | Net Revenue
Concentration Risk [Line Items]
Concentration risk (percent)	14.00%	14.00%	17.00%	13.00%
Tech Data Corporation | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk (percent)					17.00%