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Note 7 - Stock-based Compensation and Equity Transactions (Tables) | 6 Months Ended
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Apr. 30, 2020
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Six Months Ended April 30, |
|  | 2020 |  |  | 2019 |
Risk-free interest rate |  |  | 1.57 | % |  |  | 2.88 | %
Dividend yield |  |  | 1.23 | % |  |  | 0.98 | %
Expected life of the option (in years) |  |  | 6.47 |  |  |  | 5.96 |
Volatility factor |  |  | 49.14 | % |  |  | 55.25 | %
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Shares |  |  | Exercise Price |
Outstanding at November 1, 2019 |  |  | 890,147 |  |  | $ | 3.62 |
Options granted |  |  | 130,241 |  |  | $ | 6.53 |
Options exercised |  |  | (228,870 | ) |  | $ | 1.85 |
Options outstanding at April 30, 2020 |  |  | 791,518 |  |  | $ | 4.61 |
Options exercisable at April 30, 2020 |  |  | 419,352 |  |  | $ | 4.37 |
Options vested and expected to vest at April 30, 2020 |  |  | 790,482 |  |  | $ | 4.62 |

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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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