Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	Total
Balances (in shares) at Dec. 28, 2019	14,215,000
Balances at Dec. 28, 2019	$ 14,215	$ 111,955	$ 126,170
Net income		25,934	25,934
Expense of stock options and restricted stock units		1,016	$ 1,016
Exercise of stock options (in shares)	10,000		10,000
Exercise of stock options	$ 10	134	$ 144
Settlement of restricted stock units (in shares)	55,000
Settlement of restricted stock units	$ 55	(55)	0
Issuance of restricted stock awards (in shares)	35,000
Issuance of restricted stock awards	$ 35	(35)	0
Dividends declared		(7,466)	(7,466)
Stock issued to directors as compensation (in shares)	10,000
Stock issued to directors as compensation	$ 10	87	97
Purchase of stock (in shares)	(406,000)
Purchase of stock	$ (406)	(6,333)	(6,739)
Balances (in shares) at Dec. 26, 2020	13,919,000
Balances at Dec. 26, 2020	$ 13,919	125,237	139,156
Net income		24,405	24,405
Expense of stock options and restricted stock units		902	$ 902
Exercise of stock options (in shares)	10,000		10,000
Exercise of stock options	$ 10	134	$ 144
Settlement of restricted stock units (in shares)	50,000
Settlement of restricted stock units	$ 50	(50)	0
Dividends declared		(7,693)	(7,693)
Stock issued to directors as compensation (in shares)	6,000
Stock issued to directors as compensation	$ 6	129	135
Purchase of stock (in shares)	(492,000)
Purchase of stock	$ (492)	(9,942)	(10,434)
Balances (in shares) at Dec. 25, 2021	13,493,000
Balances at Dec. 25, 2021	$ 13,493	133,122	146,615
Net income		17,989	17,989
Expense of stock options and restricted stock units		1,974	$ 1,974
Exercise of stock options (in shares)			(0)
Settlement of restricted stock units (in shares)	97,000
Settlement of restricted stock units	$ 97	(97)	$ 0
Dividends declared		(8,154)	(8,154)
Stock issued to directors as compensation (in shares)	4,000
Stock issued to directors as compensation	$ 4	47	51
Balances (in shares) at Dec. 31, 2022	13,594,000
Balances at Dec. 31, 2022	$ 13,594	$ 144,881	$ 158,475