Organization and Summary of Significant Accounting Policies - Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016	Jul. 01, 2017	Jun. 25, 2016
Income (loss) per common share:
Anti-dilutive options excluded from computation of diluted earnings per share (in shares)	600	300	600	300
Basic Earnings (Loss) Per Share:
Net income (loss) from continuing operation	$ (992)	$ 61	$ (2,198)	$ 138
Net income (loss) from discontinued operations	75	(339)	(12,858)	(1,434)
Net loss	$ (917)	$ (278)	$ (15,056)	$ (1,296)
Weighted average number of common shares	19,741	19,628	19,708	19,616
Loss per common share (in dollars per share)	$ (0.05)	$ (0.01)	$ (0.77)	$ (0.07)
Diluted Earnings (Loss) Per Share:
Net income (loss) from continuing operation	$ (992)	$ 61	$ (2,198)	$ 138
Net income (loss) from discontinued operations	75	(339)	(12,858)	(1,434)
Net loss	$ (917)	$ (278)	$ (15,056)	$ (1,296)
Weighted average number of common shares	19,741	19,628	19,708	19,616
Incremental shares from assumed conversions of stock options and non-vested shares of restricted stock		274		265
Adjusted weighted average number of common shares	19,741	19,902	19,708	19,881
Loss per common share (in dollars per share)	$ (0.05)	$ (0.01)	$ (0.77)	$ (0.07)