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Income Taxes - Valuation allowance (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jan. 01, 2022 | Jan. 02, 2021 | Dec. 28, 2019
Changes in the valuation allowance for deferred tax assets |  |  |
Balance at Beginning of Period | $ 5,311 | $ 4,486 | $ 4,975
Additions Charged to Expenses | 5,370 | 847 | 1,044
Deductions | (1,152) | (22) | (1,533)
Balance at End of Period | 9,529 | $ 5,311 | $ 4,486
Undistributed earnings of foreign subsidiaries | 107,800 |  |
Provision for foreign withholding tax and state income taxes | $ 0 |  |

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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