Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands		3 Months Ended			10 Months Ended
	Dec. 22, 2017	Jan. 31, 2018	Jul. 31, 2017	Jan. 31, 2017	Oct. 31, 2018
Income Tax Expense (Benefit)		$ 338		$ 466
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Revaluation of Deferred Tax Asset, Decrease		298,500
Revaluation of Deferred Tax Liabilities, Decrease		12,200
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		0
Deferred Tax Assets, Valuation Allowance		661,100
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		(30,471)	$ (50,200)	323
Gain (Loss) on Extinguishment of Debt			$ (42,300)	7,646
Increase in Interest Incurred Per Year, Amount		23,400
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					21.00%
Domestic Tax Authority [Member]
Income Tax Expense (Benefit)				484
Operating Loss Carryforwards		1,600,000
State and Local Jurisdiction [Member]
Income Tax Expense (Benefit)		338		$ (18)
Operating Loss Carryforwards		2,600,000
State and Local Jurisdiction [Member] | Between 2018 and 2022 [Member]
Operating Loss Carryforwards		247,100
State and Local Jurisdiction [Member] | Between 2023 and 2027 [Member]
Operating Loss Carryforwards		463,100
State and Local Jurisdiction [Member] | Between 2028 and 2032 [Member]
Operating Loss Carryforwards		1,500,000
State and Local Jurisdiction [Member] | Between 2033 and 2037 [Member]
Operating Loss Carryforwards		$ 350,000