Condensed Consolidated Statements Of Income (Loss) And Retained Earnings (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
NET SALES	$ 23,461,551	$ 21,364,465
COST OF SALES	23,538,514	21,776,225
Gross loss from operations	(76,963)	(411,760)
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	3,646,195	3,750,405
Loss from operations	(3,723,158)	(4,162,165)
OTHER INCOME (EXPENSE):
Interest income	22,168	33,049
Interest expense	(54,454)	(47,646)
Gain on sale of equity investments	0	3,069,284
Dividend income	104,000	748,736
Other, net	(14,201)	(2,451)
Total other income (expense)	57,513	3,800,972
Loss from continuing operations before income taxes	(3,665,645)	(361,193)
BENEFIT FROM INCOME TAXES	(1,025,000)	(101,000)
Equity in affiliate loss, net of tax	(51,226)	(2,222)
Net loss from continuing operations	(2,691,871)	(262,415)
Discontinued operations:
Loss from operations of Tulsa Dynaspan, Inc. and Beaver Lake Concrete, Inc. (including gain on disposal of $0 and $0, respectively)	(177,306)	(2,328,026)
BENEFIT FROM INCOME TAXES	(50,000)	(649,000)
Net loss from discontinued operations	(127,306)	(1,679,026)
NET LOSS	(2,819,177)	(1,941,441)
RETAINED EARNINGS, beginning of period	98,518,546	97,758,013
RETAINED EARNINGS, end of period	$ 95,699,369	$ 95,816,572
Basic loss per share:
From continuing operations	$ (0.68)	$ (0.06)
From discontinued operations	$ (0.03)	$ (0.42)
Net loss per share	$ (0.71)	$ (0.48)