Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016	Jan. 01, 2017
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 6,039	$ 9,376	$ 443	$ 11,521	$ 45,472
Net income (loss) available to common stockholders	$ 4,689	$ 7,277	$ 344	$ 8,943
Basic weighted average common shares outstanding	35,415,416	35,117,463	35,399,820	35,109,610
Basic net income (loss) per share	$ 0.13	$ 0.21	$ 0.01	$ 0.25
Dilutive effect of preferred stock and non-vested shares	9,526,403	9,701,065	9,580,756	9,740,097
Shares used in computing diluted net income (loss) per share	44,941,819	44,818,528	44,980,576	44,849,707
Diluted net income (loss) per share	$ 0.13	$ 0.21	$ 0.01	$ 0.25
Shares excluded from diluted net income (loss) per share computations (1)	0	0	0	0
Restricted Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Less: Income attributable to participating securities	$ (104)	$ (148)	$ (8)	$ (180)
Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Less: Income attributable to participating securities	$ (1,246)	$ (1,951)	$ (91)	$ (2,398)