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Stock-Based Compensation - Shares Reserved for Future Issuance (Details) shares in Millions	Jan. 01, 2021 shares
2015 Stock Plan
Common Stock Reserved for Future Issuance
Total	18.1
Employee Stock Purchase Plan 2015
Common Stock Reserved for Future Issuance
Total	3.2

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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