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Credit Arrangements (Narrative) (Details)	3 Months Ended		3 Months Ended
	Nov. 30, 2011 USD ($)	Nov. 30, 2011 Revolving Credit Agreement [Member] USD ($)	Nov. 30, 2011 BSI Term Note [Member]	Jun. 01, 2006 BSI Term Note [Member] USD ($)	Nov. 30, 2011 Euro Line Of Credit [Member] EUR (€)
Unsecured revolving line of credit, maximum borrowing capacity	$ 3,100,000				€ 2,300,000
Basis points spread		105	50		110
Basis percentage	6.05%				2.57%
Unsecured term note amount		30,000,000		30,000,000
Principal payment, quarterly	$ 1,100,000
Revolving credit note amended date	January 23, 2011
Revolving credit note termination date	January 23, 2014
Annual commitment fee on unused portion	0.25%
Fixed interest rate	6.05%
Maturity date			Jun. 10, 2013

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The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Interest rate stated in the contractual debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.).

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Amount of the required periodic payments applied to principal.

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Reflects when the credit facility terminates, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

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Reflects when the credit facility first became available, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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