Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Sep. 28, 2019	19,261
Balance at Sep. 28, 2019	$ 19,261	$ 74,632	$ 154,372	$ (2,248)	$ 246,017
Net earnings			555		555
Compensation expense associated with stock-based plans		186			186
Cash dividends declared			(578)		(578)
Balance (in shares) at Dec. 28, 2019	19,261
Balance at Dec. 28, 2019	$ 19,261	74,818	154,349	(2,248)	246,180
Balance (in shares) at Oct. 03, 2020	19,304
Balance at Oct. 03, 2020	$ 19,304	76,387	171,068	(1,956)	264,803
Net earnings			8,143		$ 8,143
Stock options exercised, net (in shares)	10				22
Stock options exercised, net	$ 10	118			$ 128
Compensation expense associated with stock-based plans		224			224
Restricted stock units and stock options surrendered for withholding taxes payable		(13)			(13)
Cash dividends declared			(29,551)		(29,551)
Balance (in shares) at Jan. 02, 2021	19,314
Balance at Jan. 02, 2021	$ 19,314	$ 76,716	$ 149,660	$ (1,956)	$ 243,734