Note 7 - Stockholders' Equity (Details) - Exercised Stock Options (USD $)	6 Months Ended
Feb. 28, 2014 Exercise 1 [Member]	Feb. 28, 2013 Exercise 2 [Member]	Feb. 28, 2013 Exercise 3 [Member]
Note 7 - Stockholders' Equity (Details) - Exercised Stock Options [Line Items]
Options Exercised	1,000	25,140	1,734
Exercise Price	$ 7.65	$ 9.95	$ 7.65

Number of share options (or share units) exercised during the current period.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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