Organization and Summary of Significant Accounting Policies - Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2017	Mar. 26, 2016
Income (loss) per common share:
Anti-dilutive options excluded from computation of diluted earnings per share (in shares)	600	300
Basic Earnings (Loss) Per Share:
Net income (loss) from continuing operation	$ (1,206)	$ 77
Net loss from discontinued operations	(12,933)	(1,095)
Net loss	$ (14,139)	$ (1,018)
Weighted average number of common shares	19,675	19,603
Loss per common share (in dollars per share)	$ (0.72)	$ (0.05)
Diluted Earnings (Loss) Per Share:
Net income (loss) from continuing operation	$ (1,206)	$ 77
Net loss from discontinued operations	(12,933)	(1,095)
Net loss	$ (14,139)	$ (1,018)
Weighted average number of common shares	19,675	19,603
Incremental shares from assumed conversions of stock options and non-vested shares of restricted stock		256
Adjusted weighted average number of common shares	19,675	19,859
Loss per common share (in dollars per share)	$ (0.72)	$ (0.05)