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Note 10 - Stock-Based Compensation (Tables) | 3 Months Ended
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Nov. 30, 2012
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | November 30, |
|  | 2012 |  |  | 2011 |
Dividend yield |  |  |  | 0.00% |  |  |  |  | 0.00% |
Expected volatility |  |  |  | 48.0% |  |  |  |  | 48.8% |
Expected life of option (years) |  |  | 5 | - | 10 |  |  |  | 5 |
Average risk-free interest rate |  |  |  | 0.71% |  |  |  |  | 1.31% |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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Period Type: | duration