Quarterly report pursuant to Section 13 or 15(d)

INTANGIBLE ASSETS - Additional Information (Details)

v3.19.3
INTANGIBLE ASSETS - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 28, 2019
Sep. 29, 2018
Goodwill and Intangible Assets Disclosure [Abstract]        
Non-cash impairment of intangible asset $ 32,636 $ 0 $ 32,636 $ 0
Amortization of intangible assets 600 $ 1,100 2,600 $ 3,200
Estimated amortization expense, remaining 2019 3,000   3,000  
Estimated amortization expense, 2020 1,400   1,400  
Estimated amortization expense, 2021 1,200   1,200  
Estimated amortization expense, 2022 1,100   1,100  
Estimated amortization expense, 2023 $ 1,000   $ 1,000