Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2022	Apr. 30, 2021	Jan. 31, 2021	Oct. 31, 2021	Oct. 31, 2020
Income Tax Expense (Benefit), Total	$ 10,593		$ 626
Deferred Tax Assets, Net, Total	416,200
Deferred Tax Assets, Valuation Allowance, Total	101,600			$ 101,600
Contract Backlog	1,900
Federal Deferred Tax Assets Related to NOLs and Other Matters [Member]
Deferred Tax Assets, Valuation Allowance, Total					$ 396,500
Deferred Tax Assets Related to State NOLs [Member]
Deferred Tax Assets, Valuation Allowance, Total				$ 101,600	$ 181,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ (78,100)
Domestic Tax Authority [Member]
Income Tax Expense (Benefit), Total	8,050		0
Domestic Tax Authority [Member] | Between 2029 and 2038 [Member]
Operating Loss Carryforwards, Total	1,200,000
Domestic Tax Authority [Member] | Indefinite Tax Period [Member]
Operating Loss Carryforwards, Total	17,100
State and Local Jurisdiction [Member]
Income Tax Expense (Benefit), Total	2,543		$ 626
Operating Loss Carryforwards, Total	2,400,000
State and Local Jurisdiction [Member] | Indefinite Tax Period [Member]
Operating Loss Carryforwards, Total	53,900
State and Local Jurisdiction [Member] | Between 2022 and 2026 [Member]
Operating Loss Carryforwards, Total	229,800
State and Local Jurisdiction [Member] | Between 2027 and 2031 [Member]
Operating Loss Carryforwards, Total	1,500,000
State and Local Jurisdiction [Member] | Between 2032 and 2036 [Member]
Operating Loss Carryforwards, Total	397,200
State and Local Jurisdiction [Member] | Between 2037 and 2041 [Member]
Operating Loss Carryforwards, Total	$ 169,800