Consolidated Condensed Statement of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	Total
Balances (in shares) at Dec. 26, 2020	13,919
Balances at Dec. 26, 2020	$ 13,919	$ 125,237	$ 139,156
Net income		13,568	13,568
Expense of stock options and restricted stock units		437	437
Settlement of restricted stock units (in shares)	46
Settlement of restricted stock units	$ 46	(46)
Dividends declared		(3,887)	(3,887)
Purchase of stock (in shares)	(202)
Purchase of stock	$ (202)	(4,218)	(4,420)
Stock issued to directors as compensation (in shares)	6
Stock issued to directors as compensation	$ 6	129	135
Exercise of stock options (in shares)	10
Exercise of stock options	$ 10	134	144
Balances (in shares) at Jul. 10, 2021	13,779
Balances at Jul. 10, 2021	$ 13,779	131,354	145,133
Balances (in shares) at Mar. 20, 2021	13,925
Balances at Mar. 20, 2021	$ 13,925	127,975	141,900
Net income		8,126	8,126
Expense of stock options and restricted stock units		326	326
Settlement of restricted stock units (in shares)	1
Settlement of restricted stock units	$ 1	(1)
Dividends declared		(1,937)	(1,937)
Purchase of stock (in shares)	(153)
Purchase of stock	$ (153)	(3,264)	(3,417)
Stock issued to directors as compensation (in shares)	6
Stock issued to directors as compensation	$ 6	129	135
Balances (in shares) at Jul. 10, 2021	13,779
Balances at Jul. 10, 2021	$ 13,779	131,354	145,133
Balances (in shares) at Dec. 25, 2021	13,493
Balances at Dec. 25, 2021	$ 13,493	133,122	146,615
Net income		12,327	12,327
Expense of stock options and restricted stock units		1,076	1,076
Settlement of restricted stock units (in shares)	93
Settlement of restricted stock units	$ 93	(93)
Dividends declared		(4,076)	(4,076)
Stock issued to directors as compensation (in shares)	4
Stock issued to directors as compensation	$ 4	47	51
Balances (in shares) at Jul. 09, 2022	13,590
Balances at Jul. 09, 2022	$ 13,590	142,403	155,993
Balances (in shares) at Mar. 19, 2022	13,585
Balances at Mar. 19, 2022	$ 13,585	138,034	151,619
Net income		5,673	5,673
Expense of stock options and restricted stock units		688	688
Settlement of restricted stock units (in shares)	1
Settlement of restricted stock units	$ 1	(1)
Dividends declared		(2,038)	(2,038)
Stock issued to directors as compensation (in shares)	4
Stock issued to directors as compensation	$ 4	47	51
Balances (in shares) at Jul. 09, 2022	13,590
Balances at Jul. 09, 2022	$ 13,590	$ 142,403	$ 155,993