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Cash and Investments - Fair Value and Gross Unrealized Losses of Investments Available-for-Sale in an Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jan. 01, 2021
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 454,780	$ 56,299
Gross Unrealized Losses	(1,730)	(12)
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Fair Value	385,053	28,445
Gross Unrealized Losses	(1,672)	(7)
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Fair Value	43,290
Gross Unrealized Losses	(2)
U.S. Treasury and government-sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Fair Value	18,962	21,989
Gross Unrealized Losses	(21)	(4)
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Fair Value	7,475	5,865
Gross Unrealized Losses	$ (35)	$ (1)

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456

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- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 326
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-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455

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