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Income Taxes - Net Tax Effect of State and Foreign Loss Carryforwards (Details) - USD ($) $ in Millions | Dec. 29, 2019 | Dec. 30, 2018
--- | --- | ---
Operating Loss Carryforwards [Line Items] |  |
No expiration | $ 29.1 |
Loss carryforwards | 30.4 | $ 30.8
2020-2021 |  |
Operating Loss Carryforwards [Line Items] |  |
Subject to expiration | 0.5 |
2022-2036 |  |
Operating Loss Carryforwards [Line Items] |  |
Subject to expiration | $ 0.8 |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117330534&loc=d3e28680-109314 + Details
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