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Revenues - Contract Assets and Liabilities (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 01, 2021 | Oct. 02, 2020 | Oct. 01, 2021 | Oct. 02, 2020 | Jan. 01, 2021
Revenue from Contract with Customer [Abstract] |  |  |  |  |
Total contract assets | $ 0 |  | $ 0 |  | $ 0
Contract liabilities: |  |  |  |  |
Current portion | 7,535,000 |  | 7,535,000 |  | 1,790,000
Long-term portion | 9,444,000 |  | 9,444,000 |  | 3,755,000
Total contract liabilities | 16,979,000 |  | 16,979,000 |  | $ 5,545,000
Contract revenue recognized, including revenue from deferred revenue beginning balance |  |  | 6,800,000 | $ 6,800,000 |
Revenues recognized for performance obligations satisfied in previous periods | 48,400,000 | $ 33,100,000 | 116,200,000 | $ 115,300,000 |
Remaining performance obligation | $ 86,500,000 |  | $ 86,500,000 |  |

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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130533-203044 + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044 + Details
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