Note A - Basis of Presentation and Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 27, 2020	Jun. 30, 2020	Jun. 30, 2019
Foreign Currency Transaction Gain (Loss), before Tax, Total		$ (570)	$ (681)
Accounts Receivable, Allowance for Credit Loss, Ending Balance		1,740	$ 1,582
Goodwill, Impairment Loss	$ 25,380	25,380
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		$ 2,223
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		10 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		40 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		5 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		15 years