Condensed Consolidated Statements Of Income (Loss) And Retained Earnings (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Condensed Consolidated Statements Of Income (Loss) And Retained Earnings [Abstract]
NET SALES	$ 27,969,557	$ 27,998,094
COST OF SALES (includes $303,453 in 2013 and $-0- in 2012 accumulated other comprehensive income reclassifications for net periodic pension and postretirement costs)	30,174,023	27,488,126
Gross profit (loss) from operations	(2,204,466)	509,968
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES (includes $215,326 in 2013 and $-0- in 2012 accumulated other comprehensive income reclassifications for net periodic pension and postretirement costs)	4,294,005	4,034,426
Loss from operations	(6,498,471)	(3,524,458)
OTHER INCOME (EXPENSE):
Interest income	34,859	27,892
Interest expense	(47,961)	(100,049)
Gain on sale of equity investments (includes $3,069,284 in 2013 and $415,530 in 2012 accumulated other comprehensive income reclassifications for unrealized net gains on available-for-sale securities)	3,069,284	415,530
Dividend income	748,736	1,209
Other, net	4,334	65,541
Other Income (Expense), Total	3,809,252	410,123
Loss before benefit from income taxes	(2,689,219)	(3,114,335)
BENEFIT FROM INCOME TAXES (includes $1,020,000 in 2013 and $168,000 in 2012 income tax expense from reclassification items)	(750,000)	(875,000)
NET LOSS	(1,939,219)	(2,239,335)
RETAINED EARNINGS, beginning of period	97,214,376	97,751,202
RETAINED EARNINGS, end of period	$ 95,275,157	$ 95,511,867
Basic loss per share	$ (0.48)	$ (0.56)