Summary Of Significant Accounting Policies (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Summary Of Significant Accounting Policies [Abstract]
Investments	$ 15,951	$ 17,958
Advertising expenditures	5,100	7,300	$ 7,500
Design, research and development costs	3,900	$ 3,700	$ 4,200
Health care claims threshold for third party insurance	150
Workers' compensation threshold for third party insurance	$ 450
Potential common shares outstanding	17	18	50
Outstanding options to purchase common stock	54	86	120