Consolidated Statements of Cash Flows (USD $)	12 Months Ended
Aug. 31, 2014	Aug. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 5,538,412	$ 4,753,501
Adjustments to reconcile net income to net cash used in operating activities:
Stock-based compensation	454,015	306,451
Depreciation expense	454,889	435,678
Amortization expense	86,652	71,405
Loss on disposal of assets	472	84,396
Equity in income from joint ventures	(5,920,603)	(5,237,711)
Deferred income taxes	(230,883)	124,935
Increase in allowance on doubtful accounts	20,000
Receivables:
Trade, excluding joint ventures	(249,965)	(894,888)
Trade, joint ventures	(91,852)	(124,891)
Fees for services provided to joint ventures	(166,882)	213,002
Income taxes	150,764	(98,427)
Inventories	(825,176)	(1,017,188)
Prepaid expenses and other	(62,969)	363,337
Accounts payable	365,797	78,623
Income tax payable	(4,191)	8,435
Accrued liabilities	473,126	(311,693)
Net cash used in operating activities	(8,394)	(1,245,035)
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in joint venture	(110,988)
Dividends received from joint ventures	7,431,306	3,155,737
Additions to property and equipment	(1,602,441)	(1,488,059)
Effect of subsidiary consolidation on cash		1,612,768
Purchase of available for sale securities	(6,019,766)
Proceeds from sale of available for sale securities	500,000
Additions to patents	(224,185)	(255,259)
Net cash (used in) provided by investing activities	(26,074)	3,025,187
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of note payable	(933,414)	(76,119)
Dividend received by non-controlling interest	(1,440,000)	(1,752,842)
Investment by non-controlling interest	36,956
Proceeds from employee stock purchase plan	42,580	56,739
Proceeds from exercise of stock options	479,460	208,354
Net cash used in financing activities	(1,814,418)	(1,563,867)
EFFECT OF EXCHANGE RATE CHANGES ON CASH:	11,646	(39,574)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(1,837,239)	176,711
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	4,314,258	4,137,547
CASH AND CASH EQUIVALENTS AT END OF YEAR	$ 2,477,017	$ 4,314,258

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for a borrowing supported by a written promise to pay an obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration