Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2019	Oct. 02, 2018	Oct. 01, 2019	Oct. 02, 2018	Jan. 01, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Document Period End Date			Oct. 01, 2019
Net Income (Loss) Available to Common Stockholders, Basic	$ 4,243	$ 1,050	$ 2,830	$ (8,460)
Net loss	$ 4,243	$ 1,050	$ 2,830	$ (8,460)
Shares:
Basic weighted average shares outstanding (in shares)	43,990,049	43,094,524	44,007,345	41,798,640
Effect of dilutive securities (in shares)	909,127	1,734,839	1,071,194	0
Diluted weighted average number of shares outstanding (in shares)	44,899,176	44,829,363	45,078,539	41,798,640
Earnings (loss) per share:
Basic loss per share (USD per share)	$ 0.10	$ 0.02	$ 0.06	$ (0.20)
Diluted loss per share (USD per share)	$ 0.09	$ 0.02	$ 0.06	$ (0.20)
Preferred stock, shares issued (in shares)	0		0		0
Antidilutive securities excluded from computation of earnings per share	1,748,444	176,325	1,490,202	2,758,848