Organization and Summary of Significant Accounting Policies - Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 26, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Income (loss) per common share:
Anti-dilutive options excluded from computation of diluted earnings per share (in shares)													500	600	100
Basic Earnings (Loss) Per Share:
Net loss	$ (26,389,000)	$ (2,564,000)	$ (278,000)	$ (1,018,000)	$ (2,460,000)	$ (1,737,000)	$ (1,951,000)	$ (14,635,000)	$ 3,408,000.000	$ 3,084,000.000	$ 2,472,000.000	$ 1,597,000.000	$ (30,249,000)	$ (20,783,000)	$ 10,561,000
Weighted average number of common shares	19,672	19,671	19,628	19,603	19,610	19,594	19,566	19,581	19,564	19,530	19,468	19,437	19,644	19,588	19,500
Earning per common share (in dollars per share)	$ (1.34)	$ (0.13)	$ (0.01)	$ (0.05)	$ (0.13)	$ (0.09)	$ (0.10)	$ (0.75)	$ 0.17	$ 0.16	$ 0.13	$ 0.08	$ (1.54)	$ (1.06)	$ 0.54
Diluted Earnings (Loss) Per Share:
Net loss													$ (30,249,000)	$ (20,783,000)	$ 10,561,000
Weighted average number of common shares	19,672	19,671	19,628	19,603	19,610	19,594	19,566	19,581	19,564	19,530	19,468	19,437	19,644	19,588	19,500
Incremental shares from assumed conversions of stock options and non-vested shares of restricted stock															490
Adjusted weighted average number of common shares	19,672	19,671	19,628	19,603	19,610	19,594	19,566	19,581	20,062	20,014	19,960	19,924	19,644	19,588	19,990
Earnings per common share (in dollars per share)	$ (1.34)	$ (0.13)	$ (0.01)	$ (0.05)	$ (0.13)	$ (0.09)	$ (0.10)	$ (0.75)	$ 0.17	$ 0.15	$ 0.12	$ 0.08	$ (1.54)	$ (1.06)	$ 0.53