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Consolidated condensed statements of operations and comprehensive (loss) income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jul. 03, 2021
Jun. 27, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Depreciation and amortization $ 5,618 $ 5,292 $ 10,854 $ 10,599      
Bio Ventus LLC [Member]              
Depreciation and amortization         $ 21,169 $ 22,399 $ 20,614