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Note 7 - Stock-based Compensation and Equity Transactions (Tables) | 9 Months Ended
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Jul. 31, 2021
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Nine Months Ended July 31, |
|  | 2021 |  |  | 2020 |
Risk-free interest rate |  |  | 0.58 | % |  |  | 1.58 | %
Dividend yield |  |  | 0.00 | % |  |  | 0.63 | %
Expected life of the option (in years) |  |  | 7.00 |  |  |  | 7.01 |
Volatility factor |  |  | 52.34 | % |  |  | 52.68 | %
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Shares |  |  | Exercise Price |
Outstanding at November 1, 2020 |  |  | 789,179 |  |  | $ | 4.66 |
Options granted |  |  | 117,000 |  |  | $ | 6.57 |
Options exercised |  |  | (180,528 | ) |  | $ | 3.15 |
Options cancelled |  |  | (91,793 | ) |  | $ | 5.88 |
Options outstanding at July 31, 2021 |  |  | 633,858 |  |  | $ | 5.26 |
Options exercisable at July 31, 2021 |  |  | 323,568 |  |  | $ | 5.78 |
Options vested and expected to vest at July 31, 2021 |  |  | 633,522 |  |  | $ | 5.27 |

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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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