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Income Taxes (Schedule of net operating losses, tax credits and capital losses recorded deferred tax assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Operating Loss Carryforwards [Line Items]    
Total $ 52,021 $ 44,671
Gross Tax Attributes [Member]    
Operating Loss Carryforwards [Line Items]    
Net operating losses - Canada 5,952  
Net operating losses - U.S. Federal 171,565  
Net operating losses - U.S. State 145,853  
Net operating losses - Other 2,194  
Federal credits - Canada 0  
Federal credits - U.S. 0  
State credits - U.S. 0  
Federal capital loss - Canada 27,838  
Net Tax Attributes [Member]    
Operating Loss Carryforwards [Line Items]    
Net operating losses - Canada 1,577  
Net operating losses - U.S. Federal 36,029  
Net operating losses - U.S. State 6,680  
Net operating losses - Other 658  
Federal credits - Canada 255  
Federal credits - U.S. 3,042  
State credits - U.S. 92  
Federal capital loss - Canada 3,689  
Total $ 52,021  
Expiration Years [Member]    
Operating Loss Carryforwards [Line Items]    
Net operating losses - Canada 2040-2041  
Net operating losses - U.S. Federal 2037 and indefinite  
Net operating losses - U.S. State 2027-2044 and indefinite  
Net operating losses - Other 2028  
Federal credits - Canada N/A  
Federal credits - U.S. 2031-2044  
State credits - U.S. 2025-2026  
Federal capital loss - Canada N/A