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Basis of Presentation and Responsibility for interim Financial Statements (Details) - USD ($) | Sep. 29, 2019 | Jan. 01, 2019 | Dec. 31, 2018 | Jan. 01, 2018
--- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Right-of-use assets from operating leases | $ 15,100,000 |  | $ 18,400,000 |
Operating lease liability | 3,200,000 |  | 3,500,000 |
Operating lease liability | $ 12,000,000 |  | $ 14,900,000 |
Accounting Standards Update 2016-02 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Lease threshold for recognition |  | $ 5,000 |  |
Right-of-use assets from operating leases |  |  |  | $ 21,200,000
Operating lease liability |  |  |  | 3,100,000
Operating lease liability |  |  |  | $ 18,100,000

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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