Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Jul. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2019	Jul. 31, 2018	Oct. 31, 2018
Income Tax Expense (Benefit), Total	$ 537		$ 1,104		$ 1,228	$ 1,687
Deferred Tax Assets, Valuation Allowance, Total	644,600				644,600
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	(7,064)	$ 48,100	78	$ (50,200)	(39,082)	(39,971)	$ 8,100
Gain (Loss) on Extinguishment of Debt, Total			(4,266)	$ (42,300)		(5,706)
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				1,600,000
Domestic Tax Authority [Member] | Indefinite Tax Period [Member]
Operating Loss Carryforwards, Total	23,500				23,500
State and Local Jurisdiction [Member]
Income Tax Expense (Benefit), Total	537		$ 1,104		1,228	$ 1,687
State and Local Jurisdiction [Member] | Indefinite Tax Period [Member]
Operating Loss Carryforwards, Total	43,200				43,200
State and Local Jurisdiction [Member] | Between 2019 and 2038 [Member]
Operating Loss Carryforwards, Total	2,500,000				2,500,000
State and Local Jurisdiction [Member] | Between 2019 and 2023 [Member]
Operating Loss Carryforwards, Total	145,300				145,300
State and Local Jurisdiction [Member] | Between 2024 and 2028 [Member]
Operating Loss Carryforwards, Total	691,200				691,200
State and Local Jurisdiction [Member] | Between 2029 and 2033 [Member]
Operating Loss Carryforwards, Total	1,300,000				1,300,000
State and Local Jurisdiction [Member] | Between 2034 and 2038 [Member]
Operating Loss Carryforwards, Total	$ 316,100				$ 316,100