Income Taxes (Components of net deferred income tax liability) (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Income Tax Disclosure [Line Items]
Net deferred income tax liability	$ (9,027)	$ (7,967)
Canada [Member]
Income Tax Disclosure [Line Items]
Net deferred income tax liability	(223)	(148)
U.S. [Member]
Income Tax Disclosure [Line Items]
Net deferred income tax liability	(8,446)	(7,147)
Other [Member]
Income Tax Disclosure [Line Items]
Net deferred income tax liability	$ (358)	$ (672)

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e31931-109318

Name:	us-gaap_DeferredIncomeTaxLiabilitiesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant