Acquisition (Details) - USD ($) $ in Thousands	4 Months Ended		6 Months Ended
	Jul. 15, 2017	Jul. 09, 2016	Jul. 15, 2017	Jul. 09, 2016
Total consideration paid			$ (1,500)
Gain on bargain purchase	$ 0	$ 0	256	$ 0
Acquisition One [Member]
Accounts receivable, net	852		852
Inventories, net	737		737
Other assets	64		64
Intangible assets	413		413
Total fair value of assets acquired	2,066		2,066
Total liabilities assumed	(563)		(563)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total	1,503		1,503
Total consideration paid			(1,101)
Gain before deferred income tax liability	402		402
Income tax liability - deferred	$ (146)		(146)
Gain on bargain purchase			$ 256