Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Components of Inventories

Inventories consist of the following:

	March 31, 2018		December 30, 2017
	(in thousands)
Current inventory:
Raw materials	$	33,249	$	33,086
Work in process		8,596		6,826
Finished goods		14,380		10,739
Total current inventory		56,225		50,651
Long term inventory		12,497		9,905
Total inventory	$	68,722	$	60,556