Condensed Consolidated Statements Of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
OPERATING ACTIVITIES:
Net loss	$ (1,390,513)	$ (2,185,360)
Adjustments to reconcile net loss to net cash provided by (used for) operating activities:
Depreciation, depletion and amortization	5,635,517	5,866,584
Deferred income taxes	728,300	176,000
Gain on disposal of assets	(39,083)	(29,688)
Realized gain on sale of equity investments	(5,197,438)	(11,839)
Gain on disposal of other assets	0	(700,000)
Postretirement benefits and pension expense	1,200,772	2,093,957
Change in assets and liabilities:
Receivables, net	(3,294,241)	(3,776,181)
Inventories	(595,021)	(1,566,989)
Refundable income taxes	(1,520,677)	(762,617)
Prepaid expenses	(473,746)	(562,258)
Other assets	1,500	942
Accounts payable and accrued liabilities	(456,307)	364,459
Net cash used for operating activities	(5,400,937)	(1,092,990)
INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(2,430,708)	(4,010,752)
Proceeds from disposals of property, plant and equipment	72,820	52,135
Payment for acquisition of business, net of cash acquired	(534,392)	0
Proceeds from disposals of other assets	0	700,000
Payment for purchases of equity investments	(1,599,647)	(190,867)
Proceeds from disposals of equity investments	7,878,129	205,487
Increase in short-term investments, net	(10,166)	0
Net cash provided by (used for) investing activities	3,376,036	(3,243,997)
FINANCING ACTIVITIES:
Increase in line of credit, net	7,574,661	7,842,924
Payments on bank loans	(1,531,063)	(1,356,252)
Payments on other long-term debt	(509,305)	(58,883)
Cash dividends paid	(2,793,305)	(2,776,696)
Purchases of capital stock	(2,213,757)	0
Net cash provided by financing activities	527,231	3,651,093
Net decrease in cash and cash equivalents	(1,497,670)	(685,894)
CASH AND CASH EQUIVALENTS, beginning of year	2,695,267	2,149,397
CASH AND CASH EQUIVALENTS, end of period	1,197,597	1,463,503
Supplemental disclosures:
Interest paid, net of amount capitalized	220,977	285,475
Income taxes paid, net of refunds	385,527	1,617
Capital equipment additions included in accounts payable	108,339	14,898
Non-cash investing activities:
Issuance of 105,750 shares of capital stock related to acquisition of business	2,749,500	0
Note payable related to acquisition of business	$ 927,443	$ 0