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Note 15 - Stock Plans - Nonvested Share Awards (Details) - $ / shares	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Time-based Share Units [Member]
Nonvested, time-based (in shares)	288,865	231,210	105,594
Nonvested, weighted average grant date fair value, time-based (in dollars per share)	$ 19.88	$ 23.01	$ 61.77
Granted, time-based (in shares)	50,187	142,231	164,050
Granted, weighted average grant date fair value, time-based (in dollars per share)	$ 85.72	$ 19.48	$ 7.66
Vested, time-based (in shares)	104,253	62,309	21,329
Vested, weighted average grant date fair value, time-based (in dollars per share)	$ 24.33	$ 17.04	$ 45.52
Forfeited, time-based (in shares)	4,875	22,267	17,106
Forfeited, weighted average grant date fair value, time-based (in dollars per share)	$ 26.84	$ 57.81	$ 86.96
Nonvested, time-based (in shares)	229,924	288,865	231,210
Nonvested, weighted average grant date fair value, time-based (in dollars per share)	$ 26.51	$ 19.88	$ 23.01
Performance Shares [Member]
Nonvested, time-based (in shares)	294,472	136,316	101,407
Nonvested, weighted average grant date fair value, time-based (in dollars per share)	$ 24.64	$ 44.22	$ 69.28
Granted, time-based (in shares)	104,467	183,825	56,400
Granted, weighted average grant date fair value, time-based (in dollars per share)	$ 72.68	$ 15.11	$ 10.10
Vested, time-based (in shares)	47,002	4,284	8,655
Vested, weighted average grant date fair value, time-based (in dollars per share)	$ 68.52	$ 57.22	$ 42.69
Forfeited, time-based (in shares)	954	21,385	12,836
Forfeited, weighted average grant date fair value, time-based (in dollars per share)	$ 67.00	$ 70.44	$ 93.31
Nonvested, time-based (in shares)	350,983	294,472	136,316
Nonvested, weighted average grant date fair value, time-based (in dollars per share)	$ 35.60	$ 24.64	$ 44.22

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ 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 (c)(1)(iv)(3)
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X

- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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-Paragraph 2
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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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