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Schedule of Long-lived Assets by Geographic Areas (Details) - USD ($) $ in Thousands	Dec. 25, 2021	Dec. 26, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 5,717	$ 3,407
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	5,381	3,028
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	264	329
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total		11
JAPAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 72	$ 39

X

- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599

+ Details

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X

- Definition

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+ References

No definition available.

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