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Employee Benefit Plans - Weighted Average Grant Date Fair Value (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Jan. 01, 2021	Jan. 03, 2020
Stock options
ESPP
Weighted average grant-date fair value (in dollars per share)	$ 9.04	$ 9.44	$ 8.19
ESPP
ESPP
Weighted average grant-date fair value (in dollars per share)	$ 6.12	$ 6.12	$ 4.85

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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