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Leases (Narrative) (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 25, 2020 USD ($) | Sep. 25, 2020 USD ($)
Lessee Lease Description [Line Items] |  |
Weighted average remaining lease term | 4 years 6 months | 4 years 6 months
Weighted average discount rate | 4.00% | 4.00%
Operating lease payments | $ 0.0 | $ 1.8
Lessee, operating lease not yet commenced description |  | As of September 25, 2020, the Company does not have any additional operating leases that have not yet commenced. The
Five Year Opt-Out Option for London Office Lease [Member] |  |
Lessee Lease Description [Line Items] |  |
Weighted average remaining lease term | 3 years | 3 years
London Office Lease [Member] |  |
Lessee Lease Description [Line Items] |  |
Operating lease opt-out option | 5 years | 5 years
Miami Office Lease [Member] |  |
Lessee Lease Description [Line Items] |  |
Operating lease opt-out option | 4 years | 4 years
Lessee, operating lease, option to extend |  | Company did extend its Miami office lease effective July 1, 2020, for an additional four years.
Minimum [Member] |  |
Lessee Lease Description [Line Items] |  |
Operating leases terms | 1 year | 1 year
Maximum [Member] |  |
Lessee Lease Description [Line Items] |  |
Operating leases terms | 10 years | 10 years

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- Definition Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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