Net Income (Loss) Per Share Earnings Per Share Table (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Earnings Per Share, Basic									$ 0.22	$ 0.16	$ 1.01
Net income (loss)	$ 1,807	$ 3,611	$ 7,788	$ (3,102)	$ 3,921	$ 2,795	$ 6,039	$ (5,596)	$ 10,104	$ 7,159	$ 45,472
Net income available to common stockholders									$ 7,855	$ 5,562	$ 35,395
Basic weighted average common shares outstanding									35,715,372	35,416,531	35,178,329
Basic and diluted net income (loss) per share	$ 0.04	$ 0.08	$ 0.17	$ (0.09)	$ 0.09	$ 0.06	$ 0.13	$ (0.16)
Net income (loss)	$ 1,807	$ 3,611	$ 7,788	$ (3,102)	$ 3,921	$ 2,795	$ 6,039	$ (5,596)	$ 10,104	$ 7,159	$ 45,472
Basic weighted average common shares outstanding									35,715,372	35,416,531	35,178,329
Weighted Average Number Diluted Shares Outstanding Adjustment									9,604,599	9,559,983	9,673,016
Diluted weighted average common shares outstanding									45,319,971	44,976,514	44,851,345
Basic and diluted net income (loss) per share	$ 0.04	$ 0.08	$ 0.17	$ (0.09)	$ 0.09	$ 0.06	$ 0.13	$ (0.16)
Earnings Per Share, Diluted									$ 0.22	$ 0.16	$ 1.01
Restricted Stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Less: income attributable to participating securities									$ (178)	$ (118)	$ (616)
Convertible Preferred Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Less: income attributable to participating securities									$ (2,071)	$ (1,479)	$ (9,461)