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Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Jan. 31, 2019	Oct. 31, 2018	Jan. 31, 2018	Jul. 31, 2017	Oct. 31, 2018
Income Tax Expense (Benefit), Total	$ 346		$ 338
Deferred Tax Assets, Valuation Allowance, Total	640,100
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	(17,106)	$ 48,100	(30,471)	$ (50,200)	$ 8,100
Gain (Loss) on Extinguishment of Debt, Total				$ (42,300)
Domestic Tax Authority [Member]
Income Tax Expense (Benefit), Total
Domestic Tax Authority [Member] | Between 2028 and 2037 [Member]
Operating Loss Carryforwards, Total	1,600,000
Domestic Tax Authority [Member] | Indefinite Tax Period [Member]
Operating Loss Carryforwards, Total	63,900
State and Local Jurisdiction [Member]
Income Tax Expense (Benefit), Total	346		$ 338
State and Local Jurisdiction [Member] | Indefinite Tax Period [Member]
Operating Loss Carryforwards, Total	43,300
State and Local Jurisdiction [Member] | Between 2019 and 2038 [Member]
Operating Loss Carryforwards, Total	2,500,000
State and Local Jurisdiction [Member] | Between 2019 and 2023 [Member]
Operating Loss Carryforwards, Total	145,300
State and Local Jurisdiction [Member] | Between 2024 and 2028 [Member]
Operating Loss Carryforwards, Total	691,200
State and Local Jurisdiction [Member] | Between 2029 and 2033 [Member]
Operating Loss Carryforwards, Total	1,300,000
State and Local Jurisdiction [Member] | Between 2034 and 2038 [Member]
Operating Loss Carryforwards, Total	$ 320,000

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