Note L - 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, 2019	Jun. 30, 2018
Interest income	$ 43	$ 55
Interest expense	1,927	282
Income taxes	3,711	4,773
Depreciation and amortization	9,335	6,464
Assets	346,870	241,240
Expenditures for segment assets	11,979	6,328
Operating Segments [Member]
Interest income	1,180	34
Interest expense	3,049	275
Income taxes	8,292	16,370
Depreciation and amortization	13,295	6,084
Assets	430,688	318,647
Expenditures for segment assets	11,388	5,730
Segment Reconciling Items [Member]
Interest income	(1,137)	21
Interest expense	(1,122)	7
Income taxes	(4,581)	(11,597)
Depreciation and amortization	317	380
Assets	(83,818)	(77,407)
Expenditures for segment assets	$ 591	$ 598