Condensed Consolidated Statements Of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
OPERATING ACTIVITIES:
Net loss	$ (1,939,219)	$ (2,239,335)
Adjustments to reconcile net loss to net cash provided by (used for) operating activities:
Depreciation, depletion and amortization	2,847,311	2,889,860
Deferred income taxes	(73,000)	(22,000)
Gain on disposal of assets	(16,572)	(7,285)
Realized gain on sale of equity investments	(3,069,284)	(415,530)
Postretirement benefits and pension expense	981,656	927,183
Change in assets and liabilities:
Receivables, net	(1,012,547)	684,575
Inventories	(1,313,613)	(1,384,013)
Refundable income taxes	(527,771)	(853,000)
Prepaid expenses	(588,406)	(485,345)
Other assets	(653)	(250)
Accounts payable and accrued liabilities	(3,330,088)	1,801,098
Net cash provided by (used for) operating activities	(8,042,186)	895,958
INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(7,614,086)	(1,592,852)
Proceeds from disposals of property, plant and equipment	40,608	14,311
Payment for purchases of equity investments	(305,436)	0
Proceeds from disposals of equity investments	3,598,968	1,053,030
Net cash used for investing activities	(4,279,946)	(525,511)
FINANCING ACTIVITIES:
Increase in revolving loan, net	8,461,032	1,979,375
Proceeds from bank loans	4,472,950	0
Payments on bank loans	(357,143)	(720,379)
Payments on other long-term debt	(46,931)	(44,646)
Cash dividends paid	(923,136)	(1,846,272)
Net cash provided by (used for) financing activities	11,606,772	(631,922)
Net decrease in cash and cash equivalents	(715,360)	(261,475)
Cash and Cash Equivalents, beginning of year	1,440,959	1,123,870
Cash and Cash Equivalents, end of period	725,599	862,395
Supplemental disclosures:
Interest paid, net of amount capitalized	47,961	100,049
Income tax refund	149,229	0
Capital equipment additions included in accounts payable	$ 106,102	$ 170,717