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Balance Sheet Details - Accrued Liabilities (Details) - USD ($) $ in Thousands	Oct. 02, 2021	Dec. 31, 2020
Summary of accrued liabilities
Compensation and related benefits	$ 14,261	$ 23,740
Warranty and retrofit	10,126	9,208
Component inventory held by suppliers	4,606	3,992
Professional and consulting fees	4,595	4,497
Taxes payable	4,482	3,476
Current portion of revenue share obligations	4,397	2,925
Customer advances or rebates	4,358	8,374
Operating leases	3,151	2,994
Freight	2,587	1,955
Product returns	1,749	1,888
Operations	1,286	950
Other	5,846	4,737
Total accrued liabilities	$ 61,444	$ 68,736

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Accrued customer rebates.

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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