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Stockholders' Equity and Stock-Based Compensation - Stock-Based Compensation Expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2022 | Oct. 02, 2021 | Oct. 01, 2022 | Oct. 02, 2021
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense | $ 377 | $ 617 | $ 1,105 | $ 1,263
Cost of revenues |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense | 53 | 180 | 173 | 273
Research and development |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense | 39 | (2) | 100 | 48
Sales and marketing |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense | 83 | 273 | 264 | 412
General and administrative |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense | $ 202 | $ 166 | $ 568 | $ 530

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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