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Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended | 45 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Aug. 02, 2021 | Jul. 31, 2021 | Apr. 30, 2021 | Jul. 31, 2020 | Jul. 31, 2021 | Jul. 31, 2020 | Oct. 31, 2020 | Jul. 31, 2021 | Jul. 30, 2021
Income Tax Expense (Benefit), Total |  | $ 14,097 |  | $ 853 | $ (442,921) | $ 2,665 |  |  |
Deferred Tax Assets, Valuation Allowance, Total |  | 102,900 |  |  | 102,900 |  |  | $ 102,900 |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total |  | 61,799 |  | 16,216 | 112,416 | 12,959 | $ 55,400 | 176,300 |
Contract Backlog |  | 1,800,000 |  |  | 1,800,000 |  |  | 1,800,000 |
Federal Deferred Tax Assets Related to NOLs and Other Matters [Member] |  |  |  |  |  |  |  |  |
Deferred Tax Assets, Valuation Allowance, Total |  |  |  |  |  |  | 396,500 |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount |  |  |  |  | (396,500) |  |  |  |
Deferred Tax Assets Related to State NOLs [Member] |  |  |  |  |  |  |  |  |
Deferred Tax Assets, Valuation Allowance, Total |  | 102,900 |  |  | 102,900 |  | $ 181,000 | 102,900 |
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
The 10.5% 2024 Notes [Member] | Senior Secured Notes [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Redeemed, Face Amount | $ 69,700 |  |  |  |  |  |  |  |
The 10.0% 2022, and 10.5% 2024 Notes [Member] | Senior Secured Notes [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Reduction in Annual Interest Resulting from Debt Payoffs | $ 19,000 |  |  |  |  |  |  |  |
Domestic Tax Authority [Member] |  |  |  |  |  |  |  |  |
Income Tax Expense (Benefit), Total |  | 12,621 |  | 0 | (353,649) | 0 |  |  |
Domestic Tax Authority [Member] | Between 2028 and 2038 [Member] |  |  |  |  |  |  |  |  |
Operating Loss Carryforwards, Total |  | 1,300,000 |  |  | 1,300,000 |  |  | 1,300,000 |
Domestic Tax Authority [Member] | Indefinite Tax Period [Member] |  |  |  |  |  |  |  |  |
Operating Loss Carryforwards, Total |  | 15,700 |  |  | 15,700 |  |  | 15,700 |
State and Local Jurisdiction [Member] |  |  |  |  |  |  |  |  |
Income Tax Expense (Benefit), Total |  | 1,476 |  | $ 853 | (89,272) | $ 2,665 |  |  |
Operating Loss Carryforwards, Total |  | 2,400,000 |  |  | 2,400,000 |  |  | 2,400,000 |
State and Local Jurisdiction [Member] | Indefinite Tax Period [Member] |  |  |  |  |  |  |  |  |
Operating Loss Carryforwards, Total |  | 48,800 |  |  | 48,800 |  |  | 48,800 |
State and Local Jurisdiction [Member] | Between 2021 and 2025 [Member] |  |  |  |  |  |  |  |  |
Operating Loss Carryforwards, Total |  | 232,600 |  |  | 232,600 |  |  | 232,600 |
State and Local Jurisdiction [Member] | Between 2026 and 2030 [Member] |  |  |  |  |  |  |  |  |
Operating Loss Carryforwards, Total |  | 1,300,000 |  |  | 1,300,000 |  |  | 1,300,000 |
State and Local Jurisdiction [Member] | Between 2031 and 2035 [Member] |  |  |  |  |  |  |  |  |
Operating Loss Carryforwards, Total |  | 587,900 |  |  | 587,900 |  |  | 587,900 |
State and Local Jurisdiction [Member] | Between 2036 and 2040 [Member] |  |  |  |  |  |  |  |  |
Operating Loss Carryforwards, Total |  | $ 238,300 |  |  | $ 238,300 |  |  | $ 238,300 |

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