(5) Share-Based Compensation Plans - Annualized weighted average valuesof the significant assumptions used to estimate the fair values of the options granted during 2016 and 2015 (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015
Compensation and Retirement Disclosure [Abstract]
Risk-free interest rate -Low	1.39%	1.44%
Risk-free interest rate -High	1.53%	1.60%
Expected life in years	6 years	6 years
Expected volatility	0.53%	0.50%
Expected dividend yield	$ 0	$ 0
Weighted average fair value of grants	$ .85	$ 1.41