CONSOLIDATED CONDENSED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Retained Earnings	Total
Balance at Dec. 29, 2018	$ 14,439	$ 113,882	$ 128,321
Balance (in shares) at Dec. 29, 2018	14,439
Net income		2,143	2,143
Expense of stock options and restricted stock units		341	341
Exercise of stock options	$ 10	108	118
Exercise of stock options (in shares)	10
Settlement of restricted stock units	$ 25	(25)
Settlement of restricted stock units (in shares)	25
Dividends declared		(3,618)	(3,618)
Purchase of stock	$ (15)	(149)	(164)
Purchase of stock (in shares)	(15)
Stock issued to directors as compensation	$ 9	93	102
Stock issued to directors as compensation (in shares)	9
Balance at Jul. 13, 2019	$ 14,468	112,775	127,243
Balance (in shares) at Jul. 13, 2019	14,468
Balance at Mar. 23, 2019	$ 14,471	112,545	127,016
Balance (in shares) at Mar. 23, 2019	14,471
Net income		1,876	1,876
Expense of stock options and restricted stock units		197	197
Dividends declared		(1,809)	(1,809)
Purchase of stock	$ (12)	(127)	(139)
Purchase of stock (in shares)	(12)
Stock issued to directors as compensation	$ 9	93	102
Stock issued to directors as compensation (in shares)	9
Balance at Jul. 13, 2019	$ 14,468	112,775	127,243
Balance (in shares) at Jul. 13, 2019	14,468
Balance at Dec. 28, 2019	$ 14,215	111,955	126,170
Balance (in shares) at Dec. 28, 2019	14,215
Net income		10,661	10,661
Expense of stock options and restricted stock units		493	493
Settlement of restricted stock units	$ 36	(36)
Settlement of restricted stock units (in shares)	36
Issuance of restricted stock awards	$ 35	(35)
Issuance of restricted stock awards (in shares)	35
Dividends declared		(3,531)	(3,531)
Purchase of stock	$ (142)	(1,184)	(1,326)
Purchase of stock (in shares)	(142)
Stock issued to directors as compensation	$ 10	87	97
Stock issued to directors as compensation (in shares)	10
Balance at Jul. 11, 2020	$ 14,154	118,410	132,564
Balance (in shares) at Jul. 11, 2020	14,154
Balance at Mar. 21, 2020	$ 14,097	111,072	125,169
Balance (in shares) at Mar. 21, 2020	14,097
Net income		8,710	8,710
Expense of stock options and restricted stock units		357	357
Settlement of restricted stock units	$ 12	(12)
Settlement of restricted stock units (in shares)	12
Issuance of restricted stock awards	$ 35	(35)
Issuance of restricted stock awards (in shares)	35
Dividends declared		(1,769)	(1,769)
Stock issued to directors as compensation	$ 10	87	97
Stock issued to directors as compensation (in shares)	10
Balance at Jul. 11, 2020	$ 14,154	$ 118,410	$ 132,564
Balance (in shares) at Jul. 11, 2020	14,154