Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Note 5 - Restructuring Charges (Details Textual) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 29, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Restructuring Charges, Total	$ 8,500	$ 18,700	$ 13,484	$ 18,704
Integration Program [Member]
Restructuring Charges, Total			16,213	37,757
Integration Program [Member] \| Employee Severance [Member]
Restructuring Charges, Total			$ 12,170	17,791
Integration Program [Member] \| Employee Severance [Member] \| Executive Officers and Board of Directors of Xcerra [Member]
Restructuring Charges, Total				8,200
Integration Program [Member] \| Severance and Other Separation Payments [Member]
Business Combination, Contingent Consideration, Liability, Total		$ 6,900		$ 6,900