Computation of Basic and Diluted Net Income (Loss) Per Common Share - Reconciliation of Numerator and Denominator of Basic and Diluted Net Income (Loss) Per Common Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Numerator:
Income (loss) from continuing operations	$ 10,038	$ 2,231	$ (170)
Income from discontinued operations, net of tax			1,608
Net income	$ 10,038	$ 2,231	$ 1,438
Denominator:
Weighted average shares of common stock (basic)	9,892	9,245	8,935
Effect of dilutive preferred shares		448
Effect of dilutive stock options	291	291
Effect of dilutive contingent shares	174	120
Weighted average shares of common stock (diluted)	10,357	10,104	8,935
Basic net income (loss) per share:
Net income (loss) before discontinued operations	$ 1.01	$ 0.24	$ (0.02)
Discontinued operations	$ 0.00	$ 0.00	$ 0.18
Net income	$ 1.01	$ 0.24	$ 0.16
Diluted net income (loss) per share:
Net income (loss) before discontinued operations	$ 0.97	$ 0.22	$ (0.02)
Discontinued operations	$ 0.00	$ 0.00	$ 0.18
Net income	$ 0.97	$ 0.22	$ 0.16