(5) Share-Based Compensation Plans - Stock Option Activity (Details)	12 Months Ended
	Dec. 30, 2017 USD ($) shares
Retirement Benefits [Abstract]
Outstanding at beginning of year	1,557,905
Granted	167,500
Exercised
Forfeited	(50,500)
Expired	(8,000)
Outstanding at end of year	1,666,905
Options exercisable at year-end	1,230,905
Aggregate Intrinsic Value Outstanding at end of year | $	$ 266,667
Aggregate Intrinsic Value Outstanding Exercisable at end of year | $	$ 207,455
Weighted remaining contractual life outstanding	5 years 73 days
Weighted remaining contractual life outstanding exercisable	4 years 109 days 12 hours