Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets (Details Textual)

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Goodwill and Intangible Assets (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]      
Amortization expense $ 23,262 $ 8,423 $ 1,545