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Condensed Consolidated Statements of Cash Flows (USD $)
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Cash flows from operating activities:    
Net income from consolidated operations $ 5,335,659 $ 3,819,790
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 1,403,492 1,634,248
Gain on sale of fixed assets (833,792) (12,000)
Stock issued in lieu of cash compensation 55,000 79,248
Share-based compensation 631,357 570,624
Excess tax benefit on share-based compensation (307,177) (495,611)
Deferred income taxes (4,750) (35,062)
Changes in operating assets and liabilities:    
Receivables, net (1,520,314) (121,956)
Inventories, net (946,138) (345,323)
Taxes receivable 557,918  
Prepaid expenses 99,914 (304,462)
Accounts payable 415,938 792,096
Accrued taxes and other expenses 92,366 (627,009)
Retirement and other liabilities 97,074 94,366
Other assets (91,690) (21,813)
Net cash provided by operating activities 4,984,857 5,027,136
Cash flows from investing activities:    
Additions to property, plant, and equipment (1,004,256) (885,080)
Proceeds from sale of fixed assets 1,217,694 12,000
Net cash provided by (used in) investing activities 213,438 (873,080)
Cash flows from financing activities:    
Principal repayments of long-term debt (961,140) (310,796)
Proceeds from exercise of stock options, net of attestation 68,303 311,877
Excess tax benefit on share-based compensation 307,177 495,611
Payment of statutory withholdings for stock options exercised and restricted stock units vested (638,882) (304,403)
Distribution to United Development Company Limited (non-controlling interests) (289,183) (105,000)
Net cash (used in) provided by financing activities (1,513,725) 87,289
Net increase in cash and cash equivalents 3,684,570 4,241,345
Cash and cash equivalents at beginning of period 24,433,761 14,998,514
Cash and cash equivalents at end of period $ 28,118,331 $ 19,239,859