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Basic and Diluted Net Income Per Share - Summary of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Oct. 01, 2021	Jul. 02, 2021	Apr. 02, 2021	Jan. 01, 2021	Oct. 02, 2020	Jul. 03, 2020	Apr. 03, 2020	Dec. 31, 2021	Jan. 01, 2021	Jan. 03, 2020
Numerator:
Net income	$ 4,922	$ 6,020	$ 8,567	$ 4,992	$ 3,327	$ 3,892	$ (1,172)	$ (134)	$ 24,501	$ 5,913	$ 14,048
Weighted average common shares:
Common shares outstanding									47,213	45,616	44,504
Less: Unvested restricted stock									(3)	(11)	(11)
Denominator for basic calculation									47,210	45,605	44,493
Weighted average effects of potentially diluted common stock:
Diluted									49,456	47,953	46,895
Net income per share:
Basic	$ 0.10	$ 0.13	$ 0.18	$ 0.11	$ 0.07	$ 0.08	$ (0.03)		$ 0.52	$ 0.13	$ 0.32
Diluted	$ 0.10	$ 0.12	$ 0.17	$ 0.10	$ 0.07	$ 0.08	$ (0.03)		$ 0.50	$ 0.12	$ 0.30
Employee Stock Options
Weighted average effects of potentially diluted common stock:
Diluted									2,145	2,272	2,254
Unvested Restricted Stock
Weighted average effects of potentially diluted common stock:
Diluted									5	4	6
RSUs
Weighted average effects of potentially diluted common stock:
Diluted									86	71	142
PSUs
Weighted average effects of potentially diluted common stock:
Diluted									10	1

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1505-109256

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- Definition

Number of shares of common stock subject to repurchase or cancellation determined by relating the portion of time within a reporting period that these shares have been outstanding to the total time in that period. Common stock subject to repurchase are outstanding common shares that are contingently returnable (that is, subject to recall).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e2646-109256

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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
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-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1448-109256

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