Earnings (Loss) Per Share (Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 28, 2020	Mar. 30, 2019
Basic earnings (loss) per share:
Loss from continuing operations		$ (2,613)	$ (6,641)
Less: Allocation of earnings to participating securities		0	0
Loss from continuing operations available to common shareholders - basic		$ (2,613)	$ (6,641)
Basic weighted-average shares outstanding (1)	[1]	15,356	15,809
Basic earnings (loss) per share - continuing operations		$ (0.17)	$ (0.42)
Diluted earnings (loss) per share:
Loss from continuing operations available to common shareholders - basic		$ (2,613)	$ (6,641)
Add: Undistributed earnings reallocated to unvested shareholders		0	0
Loss from continuing operations available to common shareholders - basic		$ (2,613)	$ (6,641)
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]	15,356	15,809
Diluted earnings (loss) per share - continuing operations		$ (0.17)	$ (0.42)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		490	476
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		278	394

[1] Includes Common and Class B Common shares, excluding unvested participating securities of 490 thousand as of March 28, 2020 and 476 thousand as of March 30, 2019.

[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 28, 2020 were 278 thousand and for the three months ended March 30, 2019 were 394 thousand.