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Condensed Consolidated Statements of Cash Flows (USD $)
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Cash flows from operating activities:    
Net income from consolidated operations $ 5,095,800 $ 5,335,659
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 1,404,839 1,403,492
Gain on sale of fixed assets (12,363) (833,792)
Stock issued in lieu of cash compensation   55,000
Share-based compensation 497,054 631,357
Excess tax benefit on share-based compensation (276,596) (307,177)
Deferred income taxes 184,900 (4,750)
Changes in operating assets and liabilities:    
Receivables, net (775,735) (1,520,314)
Inventories (160,827) (946,138)
Taxes receivable 584,298 557,918
Prepaid expenses (307,673) 99,914
Accounts payable 136,420 907,403
Accrued taxes and other expenses (89,938) 92,366
Retirement and other liabilities 173,146 97,074
Other assets (547,354) (91,690)
Net cash provided by operating activities 5,905,971 5,476,322
Cash flows from investing activities:    
Additions to property, plant, and equipment (5,029,274) (1,004,256)
Proceeds from sale of fixed assets 12,363 1,217,694
Redemption of cash value life insurance 131,621  
Net cash (used in) provided by investing activities (4,885,290) 213,438
Cash flows from financing activities:    
Principal repayments of long-term debt (290,331) (961,140)
Proceeds from exercise of stock options, net of attestation 262,966 68,303
Excess tax benefit on share-based compensation 276,596 307,177
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) (289,183)
Net cash used in financing activities (1,632,785) (1,513,725)
Net (decrease) increase in cash and cash equivalents (612,104) 4,176,035
Cash and cash equivalents at beginning of period 29,848,798 22,102,634
Cash and cash equivalents at end of period $ 29,236,694 $ 26,278,669