Note D - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Balance, Definite Intangible Assets Gross Carrying Amount	$ 39,245	$ 39,587
Balance, Definite Intangible Assets Accumulated Amortization/Impairment	(20,272)	(14,434)
Balance at June 30, Definite Intangible Assets Net Book Value	18,973	25,153
Addition, Definite Intangible Assets Gross Carrying Amount	833	92
Addition, Definite Intangible Assets Net Book Value	833	92
Amortization, Intangible Asset	(3,390)	(4,532)
Impairment, Intangible Asset		(1,306)
Translation adjustment, Definite Intangible Assets Gross Carrying Amount	1,064	(434)
Translation adjustment, Definite Intangible Assets Net Book Value	1,064	(434)
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
Customer Relationships [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	11,554	14,843
Addition, Definite Intangible Assets Net Book Value	0	0
Amortization, Intangible Asset	(1,880)	(3,003)
Impairment, Intangible Asset		0
Translation adjustment, Definite Intangible Assets Net Book Value	647	(286)
Balance at June 30, Definite Intangible Assets Net Book Value	10,321	11,554
Technology-Based Intangible Assets [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	5,784	7,025
Addition, Definite Intangible Assets Net Book Value	0	0
Amortization, Intangible Asset	(1,226)	(1,139)
Impairment, Intangible Asset		0
Translation adjustment, Definite Intangible Assets Net Book Value	325	(102)
Balance at June 30, Definite Intangible Assets Net Book Value	4,883	5,784
Trade Names [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	1,388	2,733
Addition, Definite Intangible Assets Net Book Value	0	0
Amortization, Intangible Asset	(184)	(232)
Impairment, Intangible Asset		(1,080)
Translation adjustment, Definite Intangible Assets Net Book Value	78	(33)
Balance at June 30, Definite Intangible Assets Net Book Value	1,282	1,388
Other Intangible Assets [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	247	552
Addition, Definite Intangible Assets Net Book Value	833	92
Amortization, Intangible Asset	(100)	(158)
Impairment, Intangible Asset		(226)
Translation adjustment, Definite Intangible Assets Net Book Value	14	(13)
Balance at June 30, Definite Intangible Assets Net Book Value	$ 994	$ 247