Note G - Segment Information - Assets and Capital Expenditures by Geographical Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018
Long-Lived Assets	$ 19,277		$ 19,290
Total Assets	90,102		85,207
Capital Expenditures	796	$ 956
UNITED STATES
Long-Lived Assets	10,841		10,887
Total Assets	54,279		51,562
Capital Expenditures	337	89
Europe [Member]
Long-Lived Assets	8,436		8,403
Total Assets	35,823		$ 33,645
Capital Expenditures	$ 459	$ 867