Earnings (Loss) Per Share (Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Basic earnings (loss) per share:
Income (loss) from continuing operations		$ (547)	$ 573	$ 104	$ (2,569)
Less: Allocation of earnings to participating securities		0	(17)	(32)	0
Income (loss) from continuing operations available to common shareholders - basic		$ (547)	$ 556	$ 72	$ (2,569)
Basic weighted-average shares outstanding (1)	[1]	15,707	15,648	15,696	15,631
Basic earnings (loss) per share - continuing operations		$ (0.03)	$ 0.04	$ 0.00	$ (0.16)
Diluted earnings (loss) per share:
Income (loss) from continuing operations available to common shareholders - basic		$ (547)	$ 556	$ 72	$ (2,569)
Add: Undistributed earnings reallocated to unvested shareholders		0	0	0	0
Income (loss) from continuing operations available to common shareholders - basic		$ (547)	$ 556	$ 72	$ (2,569)
Effect of dilutive securities:
Stock options (2)	[2]	0	0	0	0
Directors' stock performance units (2)	[2]	0	96	118	0
Diluted weighted-average shares outstanding (1)(2)	[1],[2]	15,707	15,744	15,814	15,631
Diluted earnings (loss) per share - continuing operations		$ (0.03)	$ 0.04	$ 0.00	$ (0.16)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		448	104	307	220

[1] Includes Common and Class B Common shares, excluding unvested participating securities, in thousands.

[2] Shares issuable under stock option plans where the exercise price is greater than the average market price of the Company's Common Stock during the relevant period and directors' stock performance units have been excluded to the extent they are anti-dilutive. Aggregate shares excluded for the three and nine months ended September 30, 2017 were 448 and 307, respectively, and for the three and nine months ended September 24, 2016 were 104 and 220, respectively.