Acquisition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 25, 2017	Mar. 19, 2016
Total consideration paid	$ (1,500)
Gain on bargain purchase	256	$ 0
Acquisition One [Member]
Accounts receivable, net	852
Inventories, net	737
Other assets	64
Intangible assets	413
Total fair value of assets acquired	2,066
Total liabilities assumed	(563)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total	1,503
Total consideration paid	(1,101)
Gain before deferred income tax liability	402
Income tax liability - deferred	(146)
Gain on bargain purchase	$ 256