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Note 10 - Stock-based Compensation (Tables) | 12 Months Ended
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Aug. 31, 2021
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Fiscal Year 2021 |  |  | Fiscal Year 2020 |
Dividend yield |  |  | 1.65 | % |  |  | 2.41 | %
Expected volatility |  |  | 45.4 | % |  |  | 45.2 | %
Expected life of option (in years) |  |  | 10 |  |  |  | 10 |
Weighted average risk-free interest rate |  |  | 0.77 | % |  |  | 1.40 | %
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Number of Shares (#) |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value |
Outstanding at August 31, 2019 |  |  | 839,173 |  |  | $ | 9.13 |  |  |  |  |
Options granted |  |  | 300,770 |  |  |  | 10.87 |  |  |  |  |
Options exercised |  |  | (11,975 | ) |  |  | 5.13 |  |  |  |  |
Options terminated |  |  | — |  |  |  | — |  |  |  |  |
Outstanding at August 31, 2020 |  |  | 1,127,968 |  |  | $ | 9.63 |  |  |  |  |
Options granted |  |  | 419,874 |  |  |  | 8.24 |  |  |  |  |
Options exercised |  |  | (77,645 | ) |  |  | 8.18 |  |  |  |  |
Options terminated |  |  | (43,546 | ) |  |  | 9.63 |  |  |  |  |
Outstanding at August 31, 2021 |  |  | 1,426,651 |  |  | $ | 9.30 |  |  | $ | 10,514,418 |
Exercisable at August 31, 2021 |  |  | 1,022,802 |  |  | $ | 9.72 |  |  | $ | 7,108,474 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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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