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. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Basic earnings (loss) per share:
Loss from continuing operations		$ (2,577)	$ (2,922)	$ (10,399)	$ (7,779)
Less: Allocation of earnings to participating securities		0	0	0	0
Loss from continuing operations available to common shareholders - basic		$ (2,577)	$ (2,922)	$ (10,399)	$ (7,779)
Basic weighted-average shares outstanding (1)	[1]	15,899	15,786	15,864	15,754
Basic earnings (loss) per share - continuing operations		$ (0.16)	$ (0.19)	$ (0.66)	$ (0.49)
Diluted earnings (loss) per share:
Loss from continuing operations available to common shareholders - basic		$ (2,577)	$ (2,922)	$ (10,399)	$ (7,779)
Add: Undistributed earnings reallocated to unvested shareholders		0	0	0	0
Loss from continuing operations available to common shareholders - basic		$ (2,577)	$ (2,922)	$ (10,399)	$ (7,779)
Effect of dilutive securities:
Stock options (2)	[2]	0	0	0	0
Directors' stock performance units (2)	[2]	0	0	0	0
Diluted weighted-average shares outstanding (1)(2)	[1],[2]	15,899	15,786	15,864	15,754
Diluted earnings (loss) per share - continuing operations		$ (0.16)	$ (0.19)	$ (0.66)	$ (0.49)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		461		461
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		364	426	364	426

[1] Includes Common and Class B Common shares, excluding 461 thousand unvested participating securities

[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 28, 2019 were 364 thousand and for the three and nine months ended September 29, 2018 were 426 thousand.