Inventories (Tables)

3 Months Ended

Mar. 28, 2015

Inventory Disclosure [Abstract]

Summary of inventories

	March 28, 2015			December 27, 2014
Raw materials	$	6,068		$	6,329
Work in process	4,311			3,979
Finished goods	3,758			4,433
Provision for slow moving inventory	(656		)	(643		)
Total	$	13,481		$	14,098