(Non vested options) (Details)	12 Months Ended
	Jan. 02, 2018 $ / shares shares
Stock Option [Member]
Awards
Vested (in shares)	(177,491)
Restricted Stock [Member]
Awards
Beginning balance (in shares)	122,765
Granted (in shares)	328,106
Vested (in shares)	(100,871)
Forfeited (in shares)	(21,641)
Ending balance (in shares)	328,359
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 10.20
Granted (in dollars per share) | $ / shares	3.42
Vested (in dollars per share) | $ / shares	6.87
Forfeited (in dollars per share) | $ / shares	9,150
Ending balance (in dollars per share) | $ / shares	$ 5,440