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Income Taxes (Schedule of components of earnings (loss) before income taxes) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 01, 2022
Jan. 02, 2021
Dec. 28, 2019
Income Tax Disclosure [Line Items]      
Loss from continuing operations before income taxes $ (7,510) $ (50,042) $ (16,181)
Canada [Member]      
Income Tax Disclosure [Line Items]      
Loss from continuing operations before income taxes (10,797) (14,700) (11,295)
U.S. [Member]      
Income Tax Disclosure [Line Items]      
Loss from continuing operations before income taxes 3,945 (34,521) (5,548)
Other [Member]      
Income Tax Disclosure [Line Items]      
Loss from continuing operations before income taxes $ (658) $ (821) $ 662