Balance Sheet Components - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Sep. 25, 2020	Dec. 31, 2019
Receivables [Abstract]
Accounts receivable	$ 84,240	$ 91,513
Less: allowances for doubtful accounts and sales returns	(2,887)	(3,013)
Accounts Receivable, after Allowance for Credit Loss, Current	$ 81,353	$ 88,500

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant