(Non vested options) (Details)	12 Months Ended
	Jan. 03, 2017 $ / shares shares
Stock Option [Member]
Awards
Beginning balance (in shares) | shares	1,122,266
Granted (in shares) | shares	117,000
Vested (in shares) | shares	(271,457)
Forfeited (in shares) | shares	(393,654)
Ending balance (in shares) | shares	574,155
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 5.80
Granted (in dollars per share) | $ / shares	2.85
Vested (in dollars per share) | $ / shares	6.42
Forfeited (in dollars per share) | $ / shares	5,584.70
Ending balance (in dollars per share) | $ / shares	$ 8,580.20
Restricted Stock [Member]
Awards
Beginning balance (in shares) | shares	0
Granted (in shares) | shares	201,135
Vested (in shares) | shares	(27,672)
Forfeited (in shares) | shares	(50,698)
Ending balance (in shares) | shares	122,765
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 0.00
Granted (in dollars per share) | $ / shares	10.38
Vested (in dollars per share) | $ / shares	10.40
Forfeited (in dollars per share) | $ / shares	8,680.00
Ending balance (in dollars per share) | $ / shares	$ 10,200.00