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Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jan. 02, 2021 | Dec. 28, 2019 | Dec. 29, 2018
SEC Schedule, 12-09, Allowance, Sales Returns [Member] |  |  |
Balance at beginning of period | $ 772 | $ 839 | $ 632
Charged to costs and expenses | 115 | 168 | 307
Deductions | 68 | 235 | 100
Balance at end of period | 819 | 772 | 839
SEC Schedule, 12-09, Allowance, Credit Loss [Member] |  |  |
Balance at beginning of period | 261 | 139 | 325
Charged to costs and expenses | 131 | 146 | 8
Deductions | 20 | 24 | 194
Balance at end of period | 372 | 261 | 139
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] |  |  |
Balance at beginning of period | 64,285 | 44,199 | 13,980
Charged to costs and expenses | 17,116 | 20,086 | 30,219
Deductions | 0 | 0 | 0
Balance at end of period | $ 81,401 | $ 64,285 | $ 44,199

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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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