Note D - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Balance, Definite Intangible Assets Gross Carrying Amount	$ 41,142	$ 39,245
Balance, Definite Intangible Assets Accumulated Amortization/Impairment	(23,662)	(20,272)
Balance at June 30, Definite Intangible Assets Net Book Value	17,480	18,973
Addition, Definite Intangible Assets Gross Carrying Amount	421	833
Addition, Definite Intangible Assets Net Book Value	421	833
Amortization, Intangible Asset	(3,173)	(3,390)
Translation adjustment, Definite Intangible Assets Gross Carrying Amount	(1,718)	1,064
Translation adjustment, Definite Intangible Assets Net Book Value	(1,718)	1,064
Balance, Definite Intangible Assets Gross Carrying Amount	39,845	41,142
Balance, Definite Intangible Assets Accumulated Amortization/Impairment	(26,835)	(23,662)
Balance at June 30, Definite Intangible Assets Net Book Value	13,010	17,480
Customer Relationships [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	10,321	11,554
Addition, Definite Intangible Assets Net Book Value	0	0
Amortization, Intangible Asset	(1,605)	(1,880)
Translation adjustment, Definite Intangible Assets Net Book Value	(1,080)	647
Balance at June 30, Definite Intangible Assets Net Book Value	7,636	10,321
Technology-Based Intangible Assets [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	4,883	5,784
Addition, Definite Intangible Assets Net Book Value	0	0
Amortization, Intangible Asset	(1,163)	(1,226)
Translation adjustment, Definite Intangible Assets Net Book Value	(482)	325
Balance at June 30, Definite Intangible Assets Net Book Value	3,238	4,883
Trade Names [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	1,282	1,388
Addition, Definite Intangible Assets Net Book Value	0	0
Amortization, Intangible Asset	(174)	(184)
Translation adjustment, Definite Intangible Assets Net Book Value	(136)	78
Balance at June 30, Definite Intangible Assets Net Book Value	972	1,282
Other Intangible Assets [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	994	247
Addition, Definite Intangible Assets Net Book Value	421	833
Amortization, Intangible Asset	(231)	(100)
Translation adjustment, Definite Intangible Assets Net Book Value	(20)	14
Balance at June 30, Definite Intangible Assets Net Book Value	$ 1,164	$ 994