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Balance sheet components - Accounts receivable, net of allowances (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Sep. 28, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts receivable	$ 57,776	$ 124,049
Allowance for doubtful accounts	(1,744)	(1,255)
Allowance for sales incentives	(15,860)	(20,051)
Accounts receivable, net of allowances	$ 40,172	$ 102,743

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- Definition

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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