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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
3 Months Ended
Nov. 30, 2015
Nov. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net (loss) income $ (72,642) $ 1,464,096
Adjustments to reconcile net (loss) income to net cash used in operating activities:    
Stock-based compensation 121,854 143,897
Depreciation expense 159,048 117,690
Amortization expense $ 29,758 21,916
Loss on disposal of assets 12,561
Equity in income from joint ventures $ (983,753) (1,606,683)
Dividends received from joint ventures 320,786 85,641
Receivables:    
Trade, excluding joint ventures 363,381 163,824
Trade, joint ventures 45,761 398,572
Fees for services provided to joint ventures (46,892) (156,332)
Income taxes (133,668) (154,937)
Inventories (180,185) 276,298
Prepaid expenses and other (153,831) (338,643)
Accounts payable 258,792 (18,080)
Income tax payable 1,783 10,821
Accrued liabilities (480,440) (804,762)
Net cash used in operating activities (750,248) (384,121)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Additions to property and equipment (264,188) (470,711)
Proceeds from the sale of available for sale securities 1,498,574 1,495,167
Additions to patents (12,599) (52,397)
Net cash provided by investing activities $ 1,221,787 972,059
CASH FLOWS FROM FINANCING ACTIVITIES:    
Dividend received by non-controlling interest $ (560,000)
Repurchase of common stock $ (47,669)
Proceeds from employee stock purchase plan $ 34,963 $ 22,620
Proceeds from exercise of stock options 99,450
Net cash used in financing activities $ (12,706) (437,930)
EFFECT OF EXCHANGE RATE CHANGES ON CASH: (10,799) (28,286)
NET INCREASE IN CASH AND CASH EQUIVALENTS 448,034 121,722
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 2,623,981 2,477,017
CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 3,072,015 $ 2,598,739