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		1,951	1,951
Expense of stock options and restricted stock units		136	136
Settlement of restricted stock units (in shares)	24
Settlement of restricted stock units	$ 24	(24)
Dividends declared		(1,762)	(1,762)
Purchase of stock (in shares)	(142)
Purchase of stock	$ (142)	(1,184)	(1,326)
Balances (in shares) at Mar. 21, 2020	14,097
Balances at Mar. 21, 2020	$ 14,097	111,072	125,169
Balances (in shares) at Dec. 26, 2020	13,919
Balances at Dec. 26, 2020	$ 13,919	125,237	139,156
Net income		5,442	5,442
Expense of stock options and restricted stock units		111	111
Settlement of restricted stock units (in shares)	45
Settlement of restricted stock units	$ 45	(45)
Dividends declared		(1,950)	(1,950)
Purchase of stock (in shares)	(49)
Purchase of stock	$ (49)		(1,003)
Exercise of stock options (in shares)	10
Exercise of stock options	$ 10	134	144
Balances (in shares) at Mar. 20, 2021	13,925
Balances at Mar. 20, 2021	$ 13,925	$ 127,975	$ 141,900