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Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Income Tax Expense (Benefit), Total	$ 853	$ 537	$ 2,665	$ 1,228
Deferred Tax Assets, Valuation Allowance, Total	592,900		592,900
Domestic Tax Authority [Member]
Income Tax Expense (Benefit), Total	0	0	0	0
Domestic Tax Authority [Member] | Between 2028 and 2037 [Member]
Operating Loss Carryforwards, Total	1,500,000		1,500,000
Domestic Tax Authority [Member] | Indefinite Tax Period [Member]
Operating Loss Carryforwards, Total	32,200		32,200
State and Local Jurisdiction [Member]
Income Tax Expense (Benefit), Total	853	$ 537	2,665	$ 1,228
Operating Loss Carryforwards, Total	2,500,000		2,500,000
State and Local Jurisdiction [Member] | Indefinite Tax Period [Member]
Operating Loss Carryforwards, Total	74,900		74,900
State and Local Jurisdiction [Member] | Between 2020 and 2024 [Member]
Operating Loss Carryforwards, Total	211,400		211,400
State and Local Jurisdiction [Member] | Between 2025 and 2029 [Member]
Operating Loss Carryforwards, Total	1,200,000		1,200,000
State and Local Jurisdiction [Member] | Between 2030 and 2034 [Member]
Operating Loss Carryforwards, Total	760,100		760,100
State and Local Jurisdiction [Member] | Between 2035 and 2039 [Member]
Operating Loss Carryforwards, Total	$ 277,500		$ 277,500

X

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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