Note 14 - Stock-based Compensation - Option Activity (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2018 |
Oct. 31, 2017 |
Oct. 31, 2016 |
|
| Options outstanding, Number (in shares) | 1,400,584 | 1,529,704 | |
| Options outstanding, Weighted average exercise price (in dollars per share) | $ 4.86 | $ 2.48 | |
| Options outstanding, Weighted average remaining contractual life (Year) | 7 years 248 days | 7 years 149 days | 8 years 98 days |
| Options outstanding, Aggregate intrinsic value | |||
| Granted, Number (in shares) | 227,280 | ||
| Granted, Weighted average exercise price (in dollars per share) | $ 17.50 | ||
| Forfeited, Number (in shares) | (141,024) | (286,119) | |
| Forfeited, Weighted average exercise price (in dollars per share) | $ 17.50 | $ 2.74 | |
| Cancelled, Number (in shares) | (70,281) | ||
| Cancelled, Weighted average exercise price (in dollars per share) | $ 2.48 | ||
| Options outstanding, Number (in shares) | 1,259,560 | 1,400,584 | 1,529,704 |
| Options outstanding, Weighted average exercise price (in dollars per share) | $ 4.55 | $ 4.86 | $ 2.48 |
| X | ||||||||||
- Definition Number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. No definition available.
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| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were cancelled. No definition available.
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| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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| X | ||||||||||
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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