Condensed Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Dec. 30, 2017	$ 52	$ 207	$ 2,984	$ 3,243
Balance, shares at Dec. 30, 2017
Net income (loss)			326	326
Balance at Mar. 31, 2018	$ 52	207	3,310	3,569
Balance, shares at Mar. 31, 2018
Balance at Dec. 30, 2017	$ 52	207	2,984	3,243
Balance, shares at Dec. 30, 2017
Net income (loss)				416
Balance at Jun. 30, 2018	$ 52	207	3,400	3,659
Balance, shares at Jun. 30, 2018
Balance at Mar. 31, 2018	$ 52	207	3,310	3,569
Balance, shares at Mar. 31, 2018
Net income (loss)			90	90
Balance at Jun. 30, 2018	$ 52	207	3,400	3,659
Balance, shares at Jun. 30, 2018
Balance at Dec. 29, 2018	$ 52	207	3,491	3,750
Balance, shares at Dec. 29, 2018
Net income (loss)			23	23
Balance at Mar. 30, 2019	$ 52	207	3,514	3,773
Balance, shares at Mar. 30, 2019
Balance at Dec. 29, 2018	$ 52	207	3,491	3,750
Balance, shares at Dec. 29, 2018
Net income (loss)				(39)
Balance at Jun. 29, 2019	$ 52	207	3,452	3,711
Balance, shares at Jun. 29, 2019
Balance at Mar. 30, 2019	$ 52	207	3,514	3,773
Balance, shares at Mar. 30, 2019
Net income (loss)			(62)	(62)
Balance at Jun. 29, 2019	$ 52	$ 207	$ 3,452	$ 3,711
Balance, shares at Jun. 29, 2019