Intangible Assets (Schedule Of Goodwill) (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 29, 2018 |
Dec. 30, 2017 |
Dec. 31, 2016 |
|
| Intangible Assets [Abstract] | |||
| Gross goodwill, Balance at beginning of year | $ 17,417,000 | $ 16,715,000 | |
| Accumulated impairment losses, Balance at beginning of year | |||
| Net goodwill as of beginning of year | 17,417,000 | 16,715,000 | |
| Goodwill acquired during the year | |||
| Impairment loss | 0 | 0 | $ 0 |
| Currency translation adjustments | (602,000) | 702,000 | |
| Gross goodwill, Balance as of end of year | 16,815,000 | 17,417,000 | 16,715,000 |
| Accumulated impairment losses, Balance as of end of year | |||
| Net goodwill, Balance as of end of year | $ 16,815,000 | $ 17,417,000 | $ 16,715,000 |
| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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