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Stock Plans and Stock Compensation Expense (Schedule of Restricted Stock Awards) (Details) - Restricted Stock - $ / shares
12 Months Ended
Dec. 25, 2021
Dec. 26, 2020
Number of Shares    
Shares outstanding at the beginning (in shares) 359,651 461,423
Granted (in shares) 387,680 131,867
Vested (in shares) (70,509) (233,639)
Forfeited (in shares) (7,477)  
Shares outstanding at the end (in shares) 669,345 359,651
Weighted-Average Grant-Date Fair Value    
Outstanding at the beginning (in shares) $ 3.35 $ 4.30
Granted (in dollars per share) 3.11 1.00
Vested (in dollars per share) 1.84 3.90
Forfeited (in dollars per share) 3.40  
Outstanding at the end (in shares) $ 3.34 $ 3.35