Goodwill and Intangible Assets - Textual (Details) - USD ($)	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Dec. 29, 2018
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 26,372,000		$ 26,372,000
Increase in adjusted cost basis of intangible assets due to foreign currency movements	50,000
Increase in accumulated amortization of intangibles assets due to foreign currency movements	50,000
Total amortization expense	755,000	$ 35,000
Impairment charges	0	$ 0
Intangible assets acquired, In-process research and development	$ 1,400,000
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles estimated remaining lives	1 year
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles estimated remaining lives	15 years