Note 15 - Income Taxes (Detail) (USD $)	Aug. 31, 2012	Aug. 31, 2011
Undistributed Earnings of Foreign Subsidiaries	$ 18,185,000	$ 17,948,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	3,438,300	3,524,300
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0	0
Foreign Tax Authority [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	469,000
Tax Credit Carryforward, Valuation Allowance		3,438,300
Federal and State [Member]
Tax Credit Carryforward, Amount		1,494,800
Minnesota Tax Authority [Member] \| Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Valuation Allowance		$ 1,494,800

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The portion of the deferred tax asset arising from a tax credit carryforward for which it is more likely than not that a tax benefit will not be realized.

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- Definition

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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