Income Taxes (Schedule of components of earnings (loss) before income taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Oct. 01, 2022	Jul. 02, 2022	Apr. 02, 2022	Jan. 01, 2022	Oct. 02, 2021	Jul. 03, 2021	Apr. 03, 2021	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Income Tax Disclosure [Line Items]
Loss from continuing operations before income taxes	$ 414	$ (16,898)	$ 3,437	$ 1,189	$ (5,736)	$ (105)	$ (4,569)	$ 2,810	$ (11,858)	$ (7,600)	$ (50,042)
Canada [Member]
Income Tax Disclosure [Line Items]
Loss from continuing operations before income taxes									(11,181)	(10,797)	(14,700)
U.S. [Member]
Income Tax Disclosure [Line Items]
Loss from continuing operations before income taxes									(2,506)	3,855	(34,521)
Other [Member]
Income Tax Disclosure [Line Items]
Loss from continuing operations before income taxes									$ 1,829	$ (658)	$ (821)