Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Income Tax Expense (Benefit), Total	$ 1,712	$ 346
Deferred Tax Assets, Valuation Allowance, Total	596,000
Domestic Tax Authority [Member]
Income Tax Expense (Benefit), Total
Domestic Tax Authority [Member] | Between 2028 and 2037 [Member]
Operating Loss Carryforwards, Total	1,500,000
Domestic Tax Authority [Member] | Indefinite Tax Period [Member]
Operating Loss Carryforwards, Total	32,100
State and Local Jurisdiction [Member]
Income Tax Expense (Benefit), Total	1,712	$ 346
Operating Loss Carryforwards, Total	2,500,000
State and Local Jurisdiction [Member] | Indefinite Tax Period [Member]
Operating Loss Carryforwards, Total	74,400
State and Local Jurisdiction [Member] | Between 2020 and 2024 [Member]
Operating Loss Carryforwards, Total	211,400
State and Local Jurisdiction [Member] | Between 2025 and 2029 [Member]
Operating Loss Carryforwards, Total	1,200,000
State and Local Jurisdiction [Member] | Between 2030 and 2034 [Member]
Operating Loss Carryforwards, Total	760,100
State and Local Jurisdiction [Member] | Between 2035 and 2039 [Member]
Operating Loss Carryforwards, Total	$ 277,600