Note E - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Balance, Definite Intangible Assets Gross Carrying Amount	$ 31,925	$ 39,845
Balance, Definite Intangible Assets Accumulated Amortization/Impairment	(19,288)	(26,835)
Balance at June 30, Definite Intangible Assets Net Book Value	12,637	13,010
Addition, Definite Intangible Assets Gross Carrying Amount	3,488	2,204
Addition, Definite Intangible Assets Net Book Value	3,488	2,204
Reduction, Definite Intangible Assets Gross Carrying Amount	(714)	(10,506)
Reduction, Definite Intangible Assets Accumulated Amortization/Impairment	714	10,506
Amortization, Intangible Asset	(3,273)	(2,959)
Translation adjustment, Definite Intangible Assets Gross Carrying Amount	166	382
Translation adjustment, Definite Intangible Assets Net Book Value	(166)	382
Amortization, Intangible Asset	(3,273)	(2,959)
Translation adjustment, Definite Intangible Assets Gross Carrying Amount	(166)	(382)
Balance, Definite Intangible Assets Gross Carrying Amount	34,533	31,925
Balance, Definite Intangible Assets Accumulated Amortization/Impairment	(21,847)	(19,288)
Balance at June 30, Definite Intangible Assets Net Book Value	12,686	12,637
Customer Relationships [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	6,553	7,636
Addition, Definite Intangible Assets Net Book Value	1,519	0
Amortization, Intangible Asset	(1,245)	(1,340)
Translation adjustment, Definite Intangible Assets Net Book Value	(107)	257
Amortization, Intangible Asset	(1,245)	(1,340)
Balance at June 30, Definite Intangible Assets Net Book Value	6,720	6,553
Technology-Based Intangible Assets [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	2,422	3,238
Addition, Definite Intangible Assets Net Book Value	987	0
Amortization, Intangible Asset	(1,280)	(1,202)
Translation adjustment, Definite Intangible Assets Net Book Value	(31)	386
Amortization, Intangible Asset	(1,280)	(1,202)
Balance at June 30, Definite Intangible Assets Net Book Value	2,098	2,422
Trade Names [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	668	972
Addition, Definite Intangible Assets Net Book Value	857	0
Amortization, Intangible Asset	0	(39)
Translation adjustment, Definite Intangible Assets Net Book Value	(14)	(265)
Amortization, Intangible Asset	0	(39)
Balance at June 30, Definite Intangible Assets Net Book Value	1,511	668
Other Intangible Assets [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	2,994	1,164
Addition, Definite Intangible Assets Net Book Value	125	2,204
Amortization, Intangible Asset	(748)	(378)
Translation adjustment, Definite Intangible Assets Net Book Value	(14)	4
Amortization, Intangible Asset	(748)	(378)
Balance at June 30, Definite Intangible Assets Net Book Value	$ 2,357	$ 2,994