Stock Plans and Stock Compensation Expense (Schedule of Stock Options) (Details) - Share-based Payment Arrangement, Option - $ / shares		12 Months Ended
	May 30, 2022	Dec. 31, 2022	Dec. 25, 2021
Number of Shares
Outstanding at the beginning (in shares)		141,000	151,000
Forfeited(in shares)			(10,000)
Expired (in shares)	(141,000)	(141,000)
Outstanding at the end (in shares)		0	141,000
Options Exercisable (in shares)		0	0
Weighted-Average Exercise Price
Options outstanding at the beginning (in dollars per share)		$ 4.36	$ 4.35
Options forfeited, weighted average exercise price (in dollars per share)			4.17
Options expired, weighted average exercise price (in dollars per share)		4.36
Options outstanding at the end (in dollars per share)		0	4.36
Options exercisable at the end (in dollars per share)		$ 0	$ 0
Weighted-Average Remaining Contractual Life (in years)
Weighted average remaining contractual term		0 years	4 months 24 days