CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 30, 2017	$ 14,372,000	$ 99,908,000	$ (2,610,000)	$ 111,670,000
Balance (in shares) at Dec. 30, 2017	14,372
Other comprehensive income (loss)			2,610,000	2,610,000
Net income		16,862,000	0	16,862,000
Expense of stock options and restricted stock units		469,000	0	469,000
Exercise of stock options	$ 9,000	45,000	0	54,000
Exercise of stock options (in shares)	9
Settlement of restricted stock units	$ 47,000	(47,000)	0	0
Settlement of restricted stock units (in shares)	47
Dividends declared		(5,410,000)	0	(5,410,000)
Stock issued to directors as compensation	$ 12,000	153,000	0	165,000
Stock issued to directors as compensation (in shares)	12
Balance at Oct. 06, 2018	$ 14,440,000	111,980,000	0	126,420,000
Balance (in shares) at Oct. 06, 2018	14,440
Balance at Jul. 14, 2018	$ 14,440,000	110,112,000	0	124,552,000
Balance (in shares) at Jul. 14, 2018	14,440
Other comprehensive income (loss)			0	0
Net income		3,575,000	0	3,575,000
Expense of stock options and restricted stock units		99,000	0	99,000
Dividends declared		(1,806,000)	0	(1,806,000)
Balance at Oct. 06, 2018	$ 14,440,000	111,980,000	0	126,420,000
Balance (in shares) at Oct. 06, 2018	14,440
Balance at Dec. 29, 2018	$ 14,439,000	113,882,000	0	128,321,000
Balance (in shares) at Dec. 29, 2018	14,439
Other comprehensive income (loss)	$ 0	0	0	0
Net income		4,683,000	0	4,683,000
Expense of stock options and restricted stock units		409,000	0	409,000
Exercise of stock options	$ 10,000	108,000	0	118,000
Exercise of stock options (in shares)	10
Settlement of restricted stock units	$ 25,000	(25,000)	0	0
Settlement of restricted stock units (in shares)	25
Dividends declared		(5,423,000)	0	(5,423,000)
Purchase of stock	$ (192,000)	(1,891,000)	0	(2,083,000)
Purchase of stock (in shares)	(192)
Stock issued to directors as compensation	$ 9,000	93,000	0	102,000
Stock issued to directors as compensation (in shares)	9
Balance at Oct. 05, 2019	$ 14,291,000	111,836,000	0	126,127,000
Balance (in shares) at Oct. 05, 2019	14,291
Balance at Jul. 13, 2019	$ 14,468,000	112,775,000	0	127,243,000
Balance (in shares) at Jul. 13, 2019	14,468
Other comprehensive income (loss)	$ 0	0	0	0
Net income	0	2,540,000	0	2,540,000
Expense of stock options and restricted stock units		68,000	0	68,000
Dividends declared		(1,805,000)	0	(1,805,000)
Purchase of stock	$ (177,000)	(1,742,000)	0	(1,919,000)
Purchase of stock (in shares)	(177)
Balance at Oct. 05, 2019	$ 14,291,000	$ 111,836,000	$ 0	$ 126,127,000
Balance (in shares) at Oct. 05, 2019	14,291