Note I - Intangible Assets - Intangible Assets (Details) - USD ($)	3 Months Ended
	Sep. 30, 2022	Sep. 24, 2021
Balance, Definite Intangible Assets Gross Carrying Amount	$ 39,845,000
Balance, Definite Intangible Assets Accumulated Amortization/Impairment	(26,835,000)
Balance at June 30, Definite Intangible Assets Net Book Value	13,010,000
Addition, Definite Intangible Assets Gross Carrying Amount	9,000
Addition, Definite Intangible Assets Net Book Value	9,000
Reduction, Definite Intangible Assets Gross Carrying Amount	(10,506)
Reduction, Definite Intangible Assets Accumulated Amortization/Impairment	10,506
Amortization, Intangible Asset	(698,000)	$ (826,000)
Translation adjustment, Definite Intangible Assets Gross Carrying Amount	(761,000)
Translation adjustment, Definite Intangible Assets Net Book Value	(761,000)
Balance, Definite Intangible Assets Gross Carrying Amount	28,587,000
Balance, Definite Intangible Assets Accumulated Amortization/Impairment	(17,027,000)
Balance at June 30, Definite Intangible Assets Net Book Value	11,560,000
Customer Relationships [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	7,636,000
Addition, Definite Intangible Assets Net Book Value	0
Amortization, Intangible Asset	(323,000)
Translation adjustment, Definite Intangible Assets Net Book Value	(487,000)
Balance at June 30, Definite Intangible Assets Net Book Value	6,826,000
Technology-Based Intangible Assets [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	3,238,000
Addition, Definite Intangible Assets Net Book Value	0
Amortization, Intangible Asset	(260,000)
Translation adjustment, Definite Intangible Assets Net Book Value	0
Balance at June 30, Definite Intangible Assets Net Book Value	2,978,000
Trade Names [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	972,000
Addition, Definite Intangible Assets Net Book Value	0
Amortization, Intangible Asset	(39,000)
Translation adjustment, Definite Intangible Assets Net Book Value	(265,000)
Balance at June 30, Definite Intangible Assets Net Book Value	668,000
Other Intangible Assets [Member]
Balance at June 30, Definite Intangible Assets Net Book Value	1,164,000
Addition, Definite Intangible Assets Net Book Value	9,000
Amortization, Intangible Asset	(76,000)
Translation adjustment, Definite Intangible Assets Net Book Value	(9,000)
Balance at June 30, Definite Intangible Assets Net Book Value	$ 1,088,000