Goodwill and Intangible Assets Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Definite-Lived Intangible Assets	$ 18,952	$ 18,952
Definite-Lived Intangible Assets, Accumulated Amortization	7,897	6,806
Developed Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Definite-Lived Intangible Assets	18,851	18,851
Definite-Lived Intangible Assets, Accumulated Amortization	7,796	6,705
Trade names/trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Definite-Lived Intangible Assets	101	101
Definite-Lived Intangible Assets, Accumulated Amortization	$ 101	$ 101