Litigation Settlement Expenses (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Litigation Settlement Expenses [Member]
Litigation settlement expenses		$ 8,500
Settlement agreement, term	Mutual release and dismissal of all litigation current at the time of settlement, worldwide, including all validity challenges. It was agreed that neither party will initiate legal suit against the other for a period of five years without a 90 day meet and confer process.
BMC [Member]
Litigation Settlement Expenses [Member]
Settlement agreement, term	We agreed that for five years from the date of the agreement, we would not initiate legal suit against BMC for patent infringement for selling their range of devices and masks that were the subject of the current dispute. BMC agreed to pay us royalties on the sale of those products in the United States.