Note G - Segment Information - Assets and Capital Expenditures by Geographical Region (Details) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Long-Lived Assets	$ 20,337		$ 19,290
Total Assets	92,830		85,207
Capital Expenditures	2,662	$ 2,095
UNITED STATES
Long-Lived Assets	10,831		10,887
Total Assets	55,162		51,562
Capital Expenditures	708	426
Europe [Member]
Long-Lived Assets	9,506		8,403
Total Assets	37,668		$ 33,645
Capital Expenditures	$ 1,954	$ 1,669