Stockholders' Equity and Stock-Based Compensation Stock Option Activity (Details) - $ / shares			12 Months Ended
	Feb. 06, 2017	Feb. 25, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Summary of stock option activity [Roll Forward]
Options outstanding at the beginning of year (in shares)			2,365,916	850,732	696,176
Options outstanding at the beginning of year, Weighted-average exercise price per share (in usd per share)			$ 11.65	$ 15.38	$ 13.88
Granted (in shares)			956,809	1,547,184	422,386
Granted, Weighted-average exercise price per share (in usd per share)			$ 12.29	$ 9.53	$ 14.76
Exercised (in shares)			(27,968)	(28,000)	(131,653)
Exercised, Weighted-average exercise price per share (in usd per share)			$ 8.51	$ 6.71	$ 4.13
Forfeited (in shares)			(4,000)	(4,000)	(136,177)
Forfeited, Weighted-average exercise price per share (in usd per share)			$ 13.55	$ 16.20	$ 16.68
Expired (in shares)			0	0	0
Expired, Weighted average exercise price per share (in usd per share)			$ 0.00	$ 0.00	$ 0.00
Options outstanding at the end of year (in shares)			3,290,757	2,365,916	850,732	696,176
Options outstanding at the end of year, Weighted-average exercise price per share (in usd per share)			$ 11.86	$ 11.65	$ 15.38	$ 13.88
Options outstanding, Weighted-average remaining contractual life (in years)			7 years 3 months 18 days	8 years 4 months 24 days	7 years 8 months 12 days	6 years 2 months 12 days
Options exercisable (in shares)			1,516,605
Options exercisable, Weighted-average exercise price per share (in usd per share)			$ 12.90
Options exercisable, Weighted-average remaining contractual life (in years)			5 years 10 months 24 days
Nonqualified Stock Options Under Long Term Incentive Program [Member]
Summary of stock option activity [Roll Forward]
Granted (in shares)	956,809	1,094,306	452,878