Earnings (Loss) Per Share (Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2018	Apr. 01, 2017
Basic earnings (loss) per share:
Loss from continuing operations		$ (2,884)	$ (575)
Less: Allocation of earnings to participating securities		0	0
Loss from continuing operations available to common shareholders - basic		$ (2,884)	$ (575)
Basic weighted-average shares outstanding (1)	[1]	15,715	15,673
Basic earnings (loss) per share - continuing operations		$ (0.18)	$ (0.04)
Diluted earnings (loss) per share:
Loss from continuing operations available to common shareholders - basic		$ (2,884)	$ (575)
Add: Undistributed earnings reallocated to unvested shareholders		0	0
Loss from continuing operations available to common shareholders - basic		$ (2,884)	$ (575)
Effect of dilutive securities:
Stock options (2)	[2]	0	0
Directors' stock performance units (2)	[2]	0	0
Diluted weighted-average shares outstanding (1)(2)	[1],[2]	15,715	15,673
Diluted earnings (loss) per share - continuing operations		$ (0.18)	$ (0.04)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		488
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		448	220

[1] Includes Common and Class B Common shares, excluding 488 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 months ended March 31, 2018 and April 1, 2017 were 448 and 220, respectively, in thousands.