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Note 10 - Exercised Stock Options (Details) - $ / shares | 12 Months Ended
--- | ---
Aug. 31, 2015 | Aug. 31, 2014 | Aug. 31, 2013
Exercise 1 [Member] |  |  |
Options exercised (in shares) | 18,000 | 60,000 | 25,140
Exercise price (in dollars per share) | $ 9.76 | $ 7.65 | $ 9.95
Exercise 2 [Member] |  |  |
Options exercised (in shares) | 18,000 | 14,000 | 4,000
Exercise price (in dollars per share) | $ 7.65 | $ 8.57 | $ 12.84
Exercise 3 [Member] |  |  |
Options exercised (in shares) | 2,333 |  | 4,000
Exercise price (in dollars per share) | $ 10.20 |  | $ 8.57
Exercised 4 [Member] |  |  |
Options exercised (in shares) |  |  | 1,734
Exercise price (in dollars per share) |  |  | $ 7.65
Exercised 5 [Member] |  |  |
Options exercised (in shares) |  |  | 1,500
Exercise price (in dollars per share) |  |  | $ 9.76
Exercised 6 [Member] |  |  |
Options exercised (in shares) |  |  | 666
Exercise price (in dollars per share) |  |  | $ 7.75
Options exercised (in shares) | 38,333 | 74,000 | 37,040
Exercise price (in dollars per share) | $ 9 | $ 7.82 | $ 9.96

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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
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- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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