Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details Textual)

v3.20.2
Goodwill and Intangible Assets (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Goodwill And Intangible Assets Disclosure [Abstract]        
Impairment charge     $ 31,871  
Amortization expense $ 4,558 $ 4,478 $ 13,323 $ 13,544