Annual report pursuant to Section 13 and 15(d)

Inventories (Details)

v3.8.0.1
Inventories (Details) - USD ($)
$ in Thousands
Dec. 30, 2017
Dec. 31, 2016
Inventories [Abstract]    
Raw materials $ 20,737 $ 26,186
Work in progress 8,461 9,455
Finished goods 33,720 29,169
Inventories $ 62,918 $ 64,810