Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income from consolidated operations	$ 2,348,734	$ 2,633,168
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	681,449	692,438
Gain on sale of fixed assets	(5,463)	(833,792)
Stock issued in lieu of cash compensation		55,000
Share-based compensation	186,901	249,335
Excess tax benefit on share-based compensation	(276,596)	(296,658)
Deferred income taxes	58,450	(2,375)
Changes in operating assets and liabilities:
Receivables, net	(769,707)	(1,230,111)
Inventories	(307,718)	(1,056,442)
Taxes receivable	676,618	266,622
Prepaid expenses	(391,291)	3,747
Accounts payable	611,358	771,753
Accrued taxes and other expenses	(820,443)	(631,067)
Retirement and other liabilities	205,323	70,156
Other assets	(541,299)	(65,735)
Net cash provided by operating activities	1,656,316	626,039
Cash flows from investing activities:
Additions to property, plant, and equipment	(2,309,282)	(252,704)
Proceeds from sale of fixed assets	5,463	1,217,694
Redemption of cash value life insurance	131,621
Net cash (used in) provided by investing activities	(2,172,198)	964,990
Cash flows from financing activities:
Principal repayments of long-term debt	(145,165)	(156,414)
Proceeds from exercise of stock options, net of attestation	34,088	34,215
Excess tax benefit on share-based compensation	276,596	296,658
Payment of statutory withholdings for stock options exercised and restricted stock units vested	(672,284)	(638,882)
Distribution to United Development Company Limited (non-controlling interests)	(1,209,732)	(105,000)
Net cash used in financing activities	(1,716,497)	(569,423)
Net (decrease) increase in cash and cash equivalents	(2,232,379)	1,021,606
Cash and cash equivalents at beginning of period	29,848,798	22,102,634
Cash and cash equivalents at end of period	$ 27,616,419	$ 23,124,240