Stock Plans and Stock Compensation Expense (Schedule of Stock Options) (Details) - Share-based Payment Arrangement, Option - $ / shares	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at the beginning (in shares)	151,000	166,000
Granted (in share)	0	0
Exercised (in shares)	0	0
Forfeited(in shares)	(10,000)	(15,000)
Outstanding at the end (in shares)	141,000	151,000
Options Exercisable (in shares)	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options outstanding at the beginning (in dollars per share)	$ 4.35	$ 4.33
Options granted, weighted average exercise price (in dollars per share)	0	0	$ 4.30
Options exercised, weighted average exercise price (in dollars per share)	0	0
Options forfeited, weighted average exercise price (in dollars per share)	4.17	4.17
Options outstanding at the end (in dollars per share)	4.36	4.35
Options exercisable at the end (in dollars per share)	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term	4 months 24 days	1 year 4 months 24 days