Earnings (Loss) Per Share (Earnings (Loss) 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
Basic earnings (loss) per share:
Income (loss) from continuing operations		$ 1,226	$ 1,615	$ 650	$ (3,142)
Less: Allocation of earnings to participating securities		(31)	(49)	(31)	0
Income (loss) from continuing operations available to common shareholders - basic		$ 1,195	$ 1,566	$ 619	$ (3,142)
Basic weighted-average shares outstanding (1)	[1]	15,707	15,645	15,690	15,623
Basic earnings (loss) per share - continuing operations		$ 0.08	$ 0.10	$ 0.04	$ (0.20)
Diluted earnings (loss) per share:
Income (loss) from continuing operations available to common shareholders - basic		$ 1,195	$ 1,566	$ 619	$ (3,142)
Add: Undistributed earnings reallocated to unvested shareholders		0	1	0	0
Income (loss) from continuing operations available to common shareholders - basic		$ 1,195	$ 1,567	$ 619	$ (3,142)
Effect of dilutive securities:
Stock options (2)	[2]	0	0	0	0
Directors' stock performance units (2)	[2]	119	138	115	0
Diluted weighted-average shares outstanding (1)(2)	[1],[2]	15,826	15,783	15,805	15,623
Diluted earnings (loss) per share - continuing operations		$ 0.08	$ 0.10	$ 0.04	$ (0.20)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		307	104	307	207

[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 six months ended July 1, 2017 were 307 and for the three and six months ended June 25, 2016 were 104 and 207, respectively.