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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
6 Months Ended
Feb. 28, 2017
Feb. 29, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 891,667 $ (143,655)
Adjustments to reconcile net income (loss) to net cash used in operating activities:    
Stock-based compensation 195,832 223,715
Depreciation expense 385,583 321,437
Amortization expense 59,517 59,517
Equity in income from joint ventures (2,657,143) (1,936,420)
Deferred income taxes 24,987
Dividends received from joint ventures 564,934 4,054,606
Receivables:    
Trade, excluding joint ventures (1,177,496) (165,856)
Trade, joint ventures 329,321 (118,640)
Fees for services provided to joint ventures 164,018 242,537
Income taxes (16,484) (355,200)
Inventories (349,600) 111,146
Prepaid expenses and other (103,671) (162,301)
Accounts payable 915,538 (174,609)
Income tax payable (91,282) 2,564
Accrued liabilities 40,854 (710,031)
Net cash (used in) provided by operating activities (823,425) 1,248,810
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from the sale of available for sale securities 1,495,610
Purchase of available for sale securities (705,638)
Additions to property and equipment (599,063) (346,872)
Additions to patents (85,959) (28,057)
Net cash provided by (used in) investing activities 810,588 (1,080,567)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Dividend received by non-controlling interest (200,000) (200,000)
Repurchase of common stock (148,162) (70,549)
Proceeds from employee stock purchase plan 32,955 34,963
Net cash used in financing activities (315,207) (235,586)
EFFECT OF EXCHANGE RATE CHANGES ON CASH: (18,282) (25,298)
NET DECREASE IN CASH AND CASH EQUIVALENTS (346,326) (92,641)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 3,395,274 2,623,981
CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 3,048,948 $ 2,531,340