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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