Balance Sheet Components - Schedule of Available-for-Sale Short-Term Investments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 28, 2021	Dec. 31, 2020
Debt Securities, Available-For-Sale [Line Items]
Estimated Fair Value	$ 5,000	$ 19,997
U.S. treasuries
Debt Securities, Available-For-Sale [Line Items]
Cost	5,000	19,996
Unrealized Gains	0	1
Unrealized Losses	0	0
Estimated Fair Value	$ 5,000	$ 19,997

[Line Items] for Debt Securities, Available-For-Sale [Table]

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- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of unrealized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Publisher FASB
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Amount of unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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