Note G - Segment Information - Assets and Capital Expenditures by Geographical Region (Details) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2017
Long-Lived Assets	$ 18,832		$ 18,136
Total assets	88,097		72,611
Capital Expenditures	2,937	$ 4,332
UNITED STATES
Long-Lived Assets	10,650		10,753
Total assets	53,982		47,777
Capital Expenditures	966	2,090
Europe [Member]
Long-Lived Assets	8,182		7,383
Total assets	34,115		$ 24,834
Capital Expenditures	$ 1,971	$ 2,242