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Note 15 - Stock Plans - Nonvested Share Awards (Details) - $ / shares	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Time-based Share Units [Member]
Nonvested (in shares)	105,594	96,091	100,300
Nonvested, weighted average grant date fair value (in dollars per share)	$ 61.77	$ 60.5	$ 63.7
Granted (in shares)	164,050	37,888	32,349
Granted, weighted average grant date fair value (in dollars per share)	$ 7.66	$ 54.95	$ 60.31
Vested (in shares)	21,329	22,821	15,511
Vested, weighted average grant date fair value (in dollars per share)	$ 45.52	$ 55.19	$ 75.78
Forfeited (in shares)	17,106	5,564	21,047
Forfeited, weighted average grant date fair value (in dollars per share)	$ 86.96	$ 20.87	$ 64.30
Nonvested (in shares)	231,210	105,594	96,091
Nonvested, weighted average grant date fair value (in dollars per share)	$ 23.01	$ 61.77	$ 60.5
Performance Shares [Member]
Nonvested (in shares)	101,407	150,881	189,275
Nonvested, weighted average grant date fair value (in dollars per share)	$ 69.28	$ 50.26	$ 64.43
Granted (in shares)	56,400	47,277	17,000
Granted, weighted average grant date fair value (in dollars per share)	$ 10.10	$ 70.41	$ 70.88
Vested (in shares)	8,655	5,390	33,147
Vested, weighted average grant date fair value (in dollars per share)	$ 42.69	$ 72.52	$ 148.05
Forfeited (in shares)	12,836	91,361	22,247
Forfeited, weighted average grant date fair value (in dollars per share)	$ 93.31	$ 38.27	$ 40.84
Nonvested (in shares)	136,316	101,407	150,881
Nonvested, weighted average grant date fair value (in dollars per share)	$ 44.22	$ 69.28	$ 50.26

X

- Definition

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

+ References

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- 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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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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