Employee Share-Based Compensation (Details)	9 Months Ended
	Oct. 01, 2016 USD ($) $ / shares shares
Service Period Based Stock Options
Outstanding at Beginning of Period | shares	4,314,264
Options Granted | shares	579,148
Options Exercised | shares	(238,423)
Options Forfeited | shares	(326,663)
Outstanding at End of Period | shares	4,328,326
Exercisable at End of Period | shares	3,314,918
Weighted Average Exercise Price
Outstanding at Beginning of Period	$ 3.50
Options Granted	4.27
Options Exercised	2.67
Options Forfeited	4.15
Outstanding at End of Period	3.60
Exercisable at End of Period	$ 3.46
Weighted Average Remaining Contractual Term
Outstanding at Beginning of Period	6 years 5 months 8 days
Options Granted	10 years
Outstanding at End of Period	6 years 2 months 12 days
Exercisable at End of Period	5 years 3 months 22 days
Weighted Average Fair Value
Weighted Average Fair Value Option Granted	$ 2.71
Aggregate Intrinsic Value
Exercised | $	$ 502,000
Outstanding at End of Period | $	684,000
Exercisable at End of Period | $	$ 668,000