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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Defined benefits pension obligations and pension expenses) (Details) - USD ($)
$ in Thousands
Oct. 03, 2020
Sep. 28, 2019
Switzerland [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension obligation $ 3,572 $ 1,962
Taiwan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Pension obligation $ 1,333 $ 1,191