Note O - Derivative Financial Instruments - Impact of the Company's Derivative Instruments on the Consolidated Statement of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 25, 2020	Sep. 25, 2020	Dec. 27, 2019	Sep. 27, 2019	Dec. 25, 2020	Dec. 27, 2019
Interest rate swap	$ 104	$ 75	$ 146	$ (143)	$ 179	$ 3
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Interest rate swap	104		146		179	3
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Interest Expense [Member]
Interest rate swap	101		31		199	42
Derivative liabilities, not designated	101		31		199	42
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] | Other Nonoperating Income (Expense) [Member]
Interest rate swap	0		0		(13)	0
Derivative liabilities, not designated	$ 0		$ 0		$ (13)	$ 0