Note P - Impact of Accounting Method Change - Adjustment to Financial Statements (Details) (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 29, 2024	Mar. 31, 2023	Mar. 29, 2024	Mar. 31, 2023	Jun. 30, 2023
Benefit plan adjustments, income taxes	$ 10	$ (1)	$ 2	$ (5)
Unrealized loss on cash flow hedge, income taxes	$ 0	$ 0	$ 0	$ 0
Preferred Shares, Authorized (in shares)	200,000	200,000	200,000	200,000	200,000
Preferred Shares, Issued (in shares)	0	0	0	0	0
Preferred Shares, No Par Value (in dollars per share)	$ 0	$ 0	$ 0	$ 0	$ 0
Common shares, authorized (in shares)	30,000,000	30,000,000	30,000,000	30,000,000	30,000,000
Common shares, shares issued (in shares)	14,632,802	14,632,802	14,632,802	14,632,802	14,632,802
Common shares, no par value (in dollars per share)	$ 0	$ 0	$ 0	$ 0	$ 0
Treasury Stock, Common, Shares (in shares)	638,712	819,398	638,712	819,398	814,734
Previously Reported [Member]
Benefit plan adjustments, income taxes		$ 1		$ 1
As Reported Under New Method [Member]
Benefit plan adjustments, income taxes		$ 5		$ 5