Note I - Intangible Assets - Intangible Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 25, 2022	Mar. 31, 2023	Apr. 04, 2022
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			53,000
Addition, Definite Intangible Assets Net Book Value			53,000
Reduction, Definite Intangible Assets Gross Carrying Amount			(10,506)
Reduction, Definite Intangible Assets Accumulated Amortization/Impairment			10,506
Amortization, Intangible Asset	$ (738,000)	$ (785,000)	(2,140,000)	$ (2,415,000)
Translation adjustment, Definite Intangible Assets Gross Carrying Amount			316,000
Translation adjustment, Definite Intangible Assets Net Book Value			316,000
Balance, Definite Intangible Assets Gross Carrying Amount	29,708,000		29,708,000
Balance, Definite Intangible Assets Accumulated Amortization/Impairment	(18,469,000)		(18,469,000)
Balance at June 30, Definite Intangible Assets Net Book Value	11,239,000		11,239,000
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			(993,000)
Translation adjustment, Definite Intangible Assets Net Book Value			214,000
Balance at June 30, Definite Intangible Assets Net Book Value	6,857,000		6,857,000
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			(880,000)
Translation adjustment, Definite Intangible Assets Net Book Value			365,000
Balance at June 30, Definite Intangible Assets Net Book Value	2,723,000		2,723,000
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		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			53,000
Amortization, Intangible Asset			(228,000)
Translation adjustment, Definite Intangible Assets Net Book Value			2,000
Balance at June 30, Definite Intangible Assets Net Book Value	$ 991,000		$ 991,000