Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Earnings (loss) per common share:
Net income (loss), numerator, basic computation	$ (208)	$ 28	$ (3)	$ 108
Interest expense		6		12
Net income (loss), numerator, diluted computation	$ (208)	$ 34	$ (3)	$ 120
Weighted average shares - denominator basic computation	5,154	5,154	5,154	5,154
Effect of convertible note		282		282
Weighted average shares, as adjusted - denominator diluted computation	5,154	5,436	5,154	5,436
Earnings (loss) per common share - basic	$ (0.04)	$ 0.01	$ (0.00)	$ 0.02
Earnings (loss) per common share - diluted	$ (0.04)	$ 0.01	$ (0.00)	$ 0.02