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. 28, 2019	14,215
Balances at Dec. 28, 2019	$ 14,215	$ 111,955	$ 126,170
Net income		20,847	20,847
Expense of stock options and restricted stock units		756	756
Settlement of restricted stock units (in shares)	51
Settlement of restricted stock units	$ 51	(51)
Dividends declared		(5,515)	(5,515)
Issuance of restricted stock awards (in shares)	35
Issuance of restricted stock awards	$ 35	(35)
Purchase of stock (in shares)	(142)
Purchase of stock	$ (142)	(1,184)	(1,326)
Stock issued to directors as compensation (in shares)	10
Stock issued to directors as compensation	$ 10	87	97
Balances (in shares) at Oct. 03, 2020	14,169
Balances at Oct. 03, 2020	$ 14,169	126,860	141,029
Balances (in shares) at Jul. 11, 2020	14,154
Balances at Jul. 11, 2020	$ 14,154	118,410	132,564
Net income		10,186	10,186
Expense of stock options and restricted stock units		263	263
Settlement of restricted stock units (in shares)	15
Settlement of restricted stock units	$ 15	(15)
Dividends declared		(1,984)	(1,984)
Balances (in shares) at Oct. 03, 2020	14,169
Balances at Oct. 03, 2020	$ 14,169	126,860	141,029
Balances (in shares) at Dec. 26, 2020	13,919
Balances at Dec. 26, 2020	$ 13,919	125,237	139,156
Net income		19,534	19,534
Expense of stock options and restricted stock units		666	666
Settlement of restricted stock units (in shares)	46
Settlement of restricted stock units	$ 46	(46)
Dividends declared		(5,804)	(5,804)
Purchase of stock (in shares)	(423)
Purchase of stock	$ (423)	(8,688)	(9,111)
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 Oct. 02, 2021	13,558
Balances at Oct. 02, 2021	$ 13,558	131,162	144,720
Balances (in shares) at Jul. 10, 2021	13,779
Balances at Jul. 10, 2021	$ 13,779	131,354	145,133
Net income		5,966	5,966
Expense of stock options and restricted stock units		229	229
Dividends declared		(1,917)	(1,917)
Purchase of stock (in shares)	(221)
Purchase of stock	$ (221)	(4,470)	(4,691)
Balances (in shares) at Oct. 02, 2021	13,558
Balances at Oct. 02, 2021	$ 13,558	$ 131,162	$ 144,720