Condensed Consolidated Statements Of Sahreholders' Equity (USD $) In Thousands, except Share data	Treasury Stock [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 29, 2009
Adjustment, correction of accounting error					$ (1,277)		$ (1,277)
Balance at Dec. 31, 2009 (As Previously Reported [Member])	(4,748)	500	60	3,650	41,729	(3,286)	37,905
Balance (As Restated [Member])	(4,748)	500	60	3,650	40,452	(3,286)	36,628
Balance, shares at Dec. 31, 2009 (As Previously Reported [Member])	633,683	5,000	6,013,421
Balance, shares (As Restated [Member])	633,683	5,000	6,013,421
Net income (loss)					2,852		2,852
Change in pension and postretirement benefit plans and unrealized losses on short-term investments, net						502	502
Stock options and restricted stock issued to employees as compensation				341			341
Restricted stock issued to employees, shares			34,654
Treasury stock purchased	(22)						(22)
Treasury stock purchased, shares	1,506
Stock options exercised				72			72
Stock options exercised, shares			6,666				6,666
Common					(5,200)		(5,200)
Preferred					(25)		(25)
Balance at Dec. 31, 2010 (As Previously Reported [Member])							36,425
Balance (As Restated [Member])							35,148
Balance at Dec. 31, 2010	(4,770)	500	60	4,063	38,079	(2,784)	35,148
Balance, shares at Dec. 31, 2010	635,189	5,000	6,054,741
Net income (loss)					(2,921)		(2,921)
Change in pension and postretirement benefit plans and unrealized losses on short-term investments, net						(2,195)	(2,195)
Stock options and restricted stock issued to employees as compensation				960			960
Restricted stock issued to employees			1				1
Restricted stock issued to employees, shares			59,779
Tax benefit for the exercise of stock options				31			31
Treasury stock purchased	(1,492)						(1,492)
Treasury stock purchased, shares	100,202
Stock options exercised			1	1,137			1,138
Stock options exercised, shares			103,319				103,319
Common					(5,769)		(5,769)
Preferred					(25)		(25)
Balance at Dec. 31, 2011 (As Previously Reported [Member])							26,153
Balance (As Restated [Member])							24,876
Balance at Dec. 31, 2011	(6,262)	500	62	6,191	29,364	(4,979)	24,876
Balance, shares at Dec. 31, 2011	735,391	5,000	6,217,839
Net income (loss)					(9,452)		(9,452)
Change in pension and postretirement benefit plans and unrealized losses on short-term investments, net						980	980
Stock options and restricted stock issued to employees as compensation				867			867
Restricted stock issued to employees			1				1
Restricted stock issued to employees, shares			40,614
Tax benefit for the exercise of stock options				(31)			(31)
Treasury stock purchased	(1,224)						(1,224)
Treasury stock purchased, shares	82,309
Stock options exercised			1	676			677
Stock options exercised, shares			45,610				45,610
Reclassification of puttable common stock			2	4,123			4,125
Reclassification of puttable common stock, shares			272,479
Common					(6,259)		(6,259)
Preferred					(25)		(25)
Balance at Dec. 31, 2012	$ (7,486)	$ 500	$ 66	$ 11,826	$ 13,628	$ (3,999)	$ 14,535
Balance, shares at Dec. 31, 2012	817,700	5,000	6,576,542