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Note 7 - Stock-based Compensation and Equity Transactions - Options Outstanding (Details) - $ / shares	6 Months Ended
	Apr. 30, 2020
Outstanding, shares (in shares)	890,147
Outstanding, weighted average exercise price (in dollars per share)	$ 3.62
Options granted, shares (in shares)	130,241
Options granted, weighted average exercise price (in dollars per share)	$ 6.53
Options exercised, shares (in shares)	(228,870)
Options exercised, weighted average exercise price (in dollars per share)	$ 1.85
Options outstanding, shares (in shares)	791,518
Options outstanding, weighted average exercise price (in dollars per share)	$ 4.61
Options exercisable, shares (in shares)	419,352
Options exercisable, weighted average exercise price (in dollars per share)	$ 4.37
Options vested and expected to vest, shares (in shares)	790,482
Options vested and expected to vest, weighted average exercise price (in dollars per share)	$ 4.62

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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-Publisher FASB
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Net number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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