Note 4 - Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 26, 2022	Mar. 27, 2021	Mar. 26, 2022	Mar. 27, 2021
Net earnings available to common stockholders	$ 3,271	$ 6,061	$ 14,362	$ 7,839
Weighted average number of basic shares (in shares)	19,134	19,006	19,110	18,971
Earnings (loss) per basic share (in dollars per share)	$ 0.17	$ 0.32	$ 0.75	$ 0.41
Options	$ 0	$ 0	$ 0	$ 0
Options, shares (in shares)	72	124	70	110
Options, per share (in dollars per share)	$ 0	$ 0	$ 0	$ 0
Net earnings available to common stockholders plus assumed conversions	$ 3,271	$ 6,061	$ 14,362	$ 7,839
Weighted average number of diluted shares (in shares)	19,206	19,130	19,180	19,081
Earnings (loss) per diluted share (in dollars per share)	$ 0.17	$ 0.32	$ 0.75	$ 0.41