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Goodwill and Intangible Assets - Textual (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Jun. 29, 2019
Jun. 30, 2018
Dec. 29, 2018
Finite-Lived Intangible Assets [Line Items]          
Goodwill $ 26,310,000   $ 26,310,000   $ 26,372,000
Increase in adjusted cost basis of intangible assets due to foreign currency movements     68,000    
Increase in accumulated amortization of intangible assets due to foreign currency movements     68,000    
Reclassified in-process research and development to developed technology     500,000    
Total intangible amortization expense $ 800,000 $ 35,000 1,500,000 $ 70,000  
Impairment charges     0 $ 0  
Intangible assets acquired, In-process research and development     $ 900,000    
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