Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details Textual)

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Goodwill and Intangible Assets (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Goodwill And Intangible Assets Disclosure [Abstract]        
Amortization expense of intangible assets $ 2,038 $ 123 $ 6,386 $ 425
Amortization expense for the remainder of 2017 $ 2,038   $ 2,038