Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances (in shares) at Dec. 30, 2017	14,372,000
Balances at Dec. 30, 2017	$ 14,372	$ 99,908	$ (2,610)	$ 111,670
Other comprehensive income			2,610	2,610
Net Income		20,442		20,442
Expense of stock options and restricted stock units		604		$ 604
Exercise of stock options (in shares)	9,000			9,250
Exercise of stock options	$ 9	45		$ 54
Settlement of restricted stock units (in shares)	47,000
Settlement of restricted stock units	$ 47	(47)		0
Dividends declared		(7,215)		(7,215)
Stock issued to directors as compensation (in shares)	12,000
Stock issued to directors as compensation	$ 12	154		166
Purchase of stock (in shares)	(1,000)
Purchase of stock	$ (1)	(9)		(10)
Balances (in shares) at Dec. 29, 2018	14,439,000
Balances at Dec. 29, 2018	$ 14,439	113,882	0	128,321
Net Income		7,258		7,258
Expense of stock options and restricted stock units		513		$ 513
Exercise of stock options (in shares)	10,000			10,000
Exercise of stock options	$ 10	108		$ 118
Settlement of restricted stock units (in shares)	29,000
Settlement of restricted stock units	$ 29	(29)		0
Dividends declared		(7,204)		(7,204)
Stock issued to directors as compensation (in shares)	9,000
Stock issued to directors as compensation	$ 9	93		102
Purchase of stock (in shares)	(272,000)
Purchase of stock	$ (272)			(2,938)
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
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)
Issuance of restricted stock awards (in shares)	35,000
Issuance of restricted stock awards	$ 35	(35)		0
Balances (in shares) at Dec. 26, 2020	13,919,000
Balances at Dec. 26, 2020	$ 13,919	$ 125,237	$ 0	$ 139,156