Earnings (Loss) Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 29, 2019	Mar. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 29, 2019	Jun. 30, 2018
Earnings (loss) per common share:
Numerator: Net income-basic and diluted	$ (62)	$ 23	$ 90	$ 326	$ (39)	$ 416
Denominator: Basic and diluted earnings per share weighted average shares	5,154,000		5,154,000		5,154,000	5,154,000
Earnings per share Basic and diluted	$ (0.01)		$ 0.02		$ (0.01)	$ 0.08