Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 4,753,501	$ 3,575,646
Adjustments to reconcile net income to net cash used in operating activities:
Expensing of fair value of stock options vested	306,451	288,396
Depreciation expense	435,678	351,118
Amortization expense	71,405	128,921
Loss on disposal of assets	84,396	870
Equity in income of joint ventures	(5,237,711)	(5,519,795)
Deferred income taxes	124,935	5,605
Receivables:
Trade, excluding joint ventures	(894,888)	(156,979)
Trade, joint ventures	(124,891)	415,123
Fees for services provided to joint ventures	213,002	812,978
Income taxes	(98,427)	(61,144)
Inventories	(1,017,188)	(365,800)
Prepaid expenses and other	363,337	(220,837)
Accounts payable	78,623	(123,512)
Income tax payable	8,435	(165,308)
Accrued liabilities	(311,693)	646,024
Net cash used in operating activities	(1,245,035)	(388,694)
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in joint ventures		(484,545)
Dividends received from joint ventures	3,155,737	3,060,545
Additions to property and equipment	(1,488,059)	(1,037,468)
Effect of NTI Asean consolidation on cash (Note 2)	1,612,768
Additions to patents	(255,259)	(187,064)
Net cash provided by investing activities	3,025,187	1,351,468
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of note payable	(76,119)	(76,119)
Dividend received by non-controlling interest	(1,752,842)
Proceeds from employee stock purchase plan	56,739	55,410
Proceeds from exercise of stock options	208,354	34,531
Net cash provided by financing activities	(1,563,867)	13,822
EFFECT OF EXCHANGE RATE CHANGES ON CASH:	(39,574)	(105,411)
NET INCREASE IN CASH AND CASH EQUIVALENTS	176,711	871,185
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	4,137,547	3,266,362
CASH AND CASH EQUIVALENTS AT END OF YEAR	$ 4,314,258	$ 4,137,547