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Note 12 - Stock-based Compensation (Tables) | 3 Months Ended
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Nov. 30, 2021
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | November 30, |
|  | 2021 |  |  | 2020 |
Dividend yield |  |  | 1.65 | % |  |  | 2.37 | %
Expected volatility |  |  | 45.4 | % |  |  | 45.6 | %
Expected life of option (in years) |  |  | 10 |  |  |  | 10 |
Average risk-free interest rate |  |  | 0.77 | % |  |  | 0.28 | %

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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