Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
Nov. 30, 2014	Nov. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 1,464,096us-gaap_ProfitLoss	$ 1,304,418us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash used in operating activities:
Stock-based compensation	143,897us-gaap_ShareBasedCompensation	127,927us-gaap_ShareBasedCompensation
Depreciation expense	117,690us-gaap_Depreciation	116,690us-gaap_Depreciation
Amortization expense	21,916us-gaap_AdjustmentForAmortization	21,434us-gaap_AdjustmentForAmortization
Loss on disposal of assets	12,561us-gaap_GainLossOnDispositionOfAssets	2,178us-gaap_GainLossOnDispositionOfAssets
Loss on impairment of joint venture		50,000us-gaap_ImpairmentOfInvestments
Equity in income from joint ventures	(1,606,683)	(1,427,748)
Increase in allowance for doubtful accounts		10,000us-gaap_ProvisionForDoubtfulAccounts
Receivables:
Trade, excluding joint ventures	163,824	(302,098)
Trade, joint ventures	398,572	112,869
Fees for services provided to joint ventures	(156,332)	(374,345)
Income taxes	(154,937)	52,837
Inventories	276,298us-gaap_IncreaseDecreaseInInventories	(309,071)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other	(338,643)	(293,493)
Accounts payable	(18,080)	546,639
Income tax payable	10,821	320
Accrued liabilities	(804,762)	203,699
Net cash used in operating activities	(469,762)	(207,744)
CASH FLOWS FROM INVESTING ACTIVITIES:
Dividends received from joint ventures	85,641us-gaap_ProceedsFromDividendsReceived	12,500us-gaap_ProceedsFromDividendsReceived
Additions to property and equipment	(470,711)	(166,299)
Proceeds from the sale of available for sale securities	1,495,167
Additions to patents	(52,397)	(58,639)
Net cash provided by (used in) investing activities	1,057,700	(212,438)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of note payable		(19,030)us-gaap_RepaymentsOfNotesPayable
Dividend received by non-controlling interest	(560,000)
Proceeds from employee stock purchase plan	22,620us-gaap_ProceedsFromStockPlans	21,255us-gaap_ProceedsFromStockPlans
Proceeds from exercise of stock options	99,450	7,650
Net cash (used in) provided by financing activities	(437,930)	9,875
EFFECT OF EXCHANGE RATE CHANGES ON CASH:	(28,286)	3,420
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	121,722	(406,887)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	2,477,017	4,314,258
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 2,598,739	$ 3,907,371

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Balance Type:	debit
Period Type:	duration