Note K - Business Segments and Foreign Operations - Reconciliation of Reportable Segments Other Significant Reconciling Items to Consolidated Totals (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Interest income	$ 78	$ 43
Interest expense	1,860	1,927
Income taxes	(4,169)	3,711
Depreciation and amortization	11,925	9,335
Assets	294,127	346,870
Expenditures for segment assets	10,699	11,979
Depreciation and amortization		13,612
Operating Segments [Member]
Interest income	368	1,180
Interest expense	2,128	3,049
Income taxes	(1,759)	8,292
Depreciation and amortization	11,530	13,295
Assets	408,535	430,688
Expenditures for segment assets	10,349	11,388
Depreciation and amortization		13,295
Segment Reconciling Items [Member]
Interest income	(290)	(1,137)
Interest expense	(268)	(1,122)
Income taxes	(2,410)	(4,581)
Depreciation and amortization	395
Assets	(114,408)	(83,818)
Expenditures for segment assets	$ 350	591
Depreciation and amortization		$ 317