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Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended | 36 Months Ended
--- | --- | --- | --- | ---
Aug. 02, 2021 | Apr. 30, 2021 | Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2021
Income Tax Expense (Benefit), Total |  |  | $ (417,956) | $ 4,475 | $ 2,449 |
Deferred Tax Assets, Net, Total |  |  | 425,678 | 0 |  | $ 425,678
Deferred Tax Assets, Valuation Allowance, Total |  |  | 101,555 | 577,534 |  | 101,555
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total |  |  | 189,861 | 55,403 | (39,668) | 205,600
Contract Backlog |  |  | 1,600,000 |  |  | 1,600,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total |  |  | 300 |  |  | 300
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total |  |  | 84 | 60 | 32 |
Unrecognized Tax Benefits, Period Increase (Decrease), Total |  |  | 300 |  |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate |  |  | 500 | 700 |  | 500
Federal Deferred Tax Assets Related to NOLs and Other Matters [Member] |  |  |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  |  | (396,500) |  |  |
Deferred Tax Assets Related to State NOLs [Member] |  |  |  |  |  |
Deferred Tax Assets, Valuation Allowance, Total |  |  | 396,500 | 181,000 |  | 396,500
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  | $ (78,100) |  |  |  |
The 10.0% 2022 Notes [Member] | Senior Secured Notes [Member] |  |  |  |  |  |
Debt Instrument, Redeemed, Face Amount |  |  | 111,200 |  |  | 111,200
The 10.5% 2024 Notes [Member] | Senior Secured Notes [Member] |  |  |  |  |  |
Debt Instrument, Redeemed, Face Amount | $ 69,700 |  |  |  |  |
Reduction in Annual Interest Resulting from Debt Payoffs | $ 19,000 |  |  |  |  |
Domestic Tax Authority [Member] |  |  |  |  |  |
Operating Income (Loss), Total |  |  | (173,800) | (183,000) | (4,000) |
Operating Income (Loss), Tax Effect |  |  | 36,500 | 38,400 | 800 |
Income Tax Expense (Benefit), Total |  |  | (335,608) | 0 | 0 |
Deferred Tax Assets, Net, Total |  |  | $ 335,608 | (0) |  | 335,608
Open Tax Year |  |  | 2017 2018 2019 2020 |  |  |
Domestic Tax Authority [Member] | Between 2029 and 2038 [Member] |  |  |  |  |  |
Operating Loss Carryforwards, Total |  |  | $ 1,200,000 |  |  | 1,200,000
Domestic Tax Authority [Member] | Indefinite Tax Period [Member] |  |  |  |  |  |
Operating Loss Carryforwards, Total |  |  | 15,700 |  |  | 15,700
State and Local Jurisdiction [Member] |  |  |  |  |  |
Operating Income (Loss), Total |  |  | (55,700) | (72,500) | (1,300) |
Income Tax Expense (Benefit), Total |  |  | (82,348) | 4,475 | $ 2,449 |
Operating Loss Carryforwards, Total |  |  | 2,400,000 |  |  | 2,400,000
Deferred Tax Assets, Net, Total |  |  | 90,070 | $ (0) |  | 90,070
State and Local Jurisdiction [Member] | Indefinite Tax Period [Member] |  |  |  |  |  |
Operating Loss Carryforwards, Total |  |  | 53,900 |  |  | 53,900
State and Local Jurisdiction [Member] | Between 2022 and 2026 [Member] |  |  |  |  |  |
Operating Loss Carryforwards, Total |  |  | 229,800 |  |  | 229,800
State and Local Jurisdiction [Member] | Between 2027 and 2031 [Member] |  |  |  |  |  |
Operating Loss Carryforwards, Total |  |  | 1,500,000 |  |  | 1,500,000
State and Local Jurisdiction [Member] | Between 2032 and 2036 [Member] |  |  |  |  |  |
Operating Loss Carryforwards, Total |  |  | 397,200 |  |  | 397,200
State and Local Jurisdiction [Member] | Between 2037 and 2041 [Member] |  |  |  |  |  |
Operating Loss Carryforwards, Total |  |  | $ 169,800 |  |  | $ 169,800

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