v3.26.1
Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual)
 3 Months Ended 6 Months Ended 12 Months Ended 18 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Jun. 30, 2026
USD ($)
Accounts Receivable, after Allowance for Credit Loss, Current $ 83,064,000   $ 83,064,000   $ 55,546,000 $ 83,064,000
Oil and Gas, Joint Interest Billing, Receivable 3,300,000   3,300,000   4,800,000 3,300,000
Income Taxes Receivable 2,900,000   2,900,000   3,200,000 2,900,000
Accounts Payable and Accrued Liabilities, Current 305,500,000   305,500,000   230,300,000 305,500,000
Accounts Receivable, Allowance for Credit Loss 0   0   0 0
Inventory, Raw Materials and Supplies, Gross 3,800,000   3,800,000   7,600,000 3,800,000
Prepaid Expense 3,200,000   3,200,000   5,100,000 3,200,000
Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization 1,500,000   1,500,000   1,300,000 1,500,000
Debt Issuance Costs, Gross 15,100,000   15,100,000   8,900,000 15,100,000
Payments of Debt Issuance Costs     6,132,000 $ (0)    
Amortization of Debt Issuance Costs     2,238,000 4,091,000    
Debt Instrument, Unamortized Discount [1] 11,087,000   11,087,000   7,193,000 11,087,000
Amortization of Debt Discount (Premium)     0 4,879,000    
Income Tax Expense (Benefit) 16,448,000 $ 7,663,000 $ (11,203,000) 17,602,000    
Number of Reportable Segments     1      
Minimum [Member]            
Oil and Natural Gas Marketing Contracts, Term Over Which Consideration is Received from Purchaser     1 month      
Maximum [Member]            
Oil and Natural Gas Marketing Contracts, Term Over Which Consideration is Received from Purchaser     2 months      
Senior Unsecured Notes and Revolving Credit Facility [Member]            
Debt Issuance Costs, Gross 15,100,000   $ 15,100,000     15,100,000
Payments of Debt Issuance Costs     6,100,000   7,900,000  
Amortization of Debt Issuance Costs     2,200,000 4,100,000    
Senior Unsecured Notes Due 2024 [Member]            
Debt Instrument, Unamortized Discount $ 30,000,000   30,000,000     $ 30,000,000
Amortization of Debt Discount (Premium)     $ 0 $ 4,900,000    
Transportation Equipment [Member]            
Property, Plant, and Equipment, Useful Life 5 years   5 years     5 years
Building [Member]            
Property, Plant, and Equipment, Useful Life 40 years   40 years     40 years
Field Equipment [Member]            
Property, Plant, and Equipment, Useful Life 7 years   7 years     7 years
Furniture and Fixtures [Member]            
Property, Plant, and Equipment, Useful Life 5 years   5 years     5 years
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Largest Purchaser [Member]            
Concentration Risk, Percentage       87.00%   88.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Second Largest Purchaser [Member]            
Concentration Risk, Percentage     6.00% 10.00%    
Electric Power Infrastructure [Member]            
Accounts Payable and Accrued Liabilities, Current $ 1,900,000   $ 1,900,000   1,900,000 $ 1,900,000
Texas Comptroller of Public Accounts Office [Member]            
Severance Tax Receivable 10,000,000   10,000,000   10,000,000 10,000,000
Texas Margin Tax [Member]            
Income Tax Expense (Benefit)     0 $ 0    
Crude Oil, Natural Gas and Natural Gas Liquids [Member]            
Accounts Receivable, after Allowance for Credit Loss, Current 60,800,000   60,800,000   35,400,000 60,800,000
Electric Power Infrastructure [Member]            
Accounts Receivable, after Allowance for Credit Loss, Current 4,100,000   4,100,000   224,000 4,100,000
Aid-in-construction Receivables [Member] | WTG Gas Processing, L.P. [Member]            
Contract with Customer, Asset, after Allowance for Credit Loss $ 14,700,000   14,700,000   $ 15,200,000 $ 14,700,000
Aid-in-construction [Member] | WTG Gas Processing, L.P. [Member]            
Contract with Customer, Asset, Asset Funding     0 71,000,000,000    
Contract with Customer, Asset, Payments Received     $ 531,000,000,000 $ 878,000,000,000    
[1] Debt issuance costs as of June 30, 2026 and December 31, 2025 consisted of $15.1 million and $8.9 million, respectively, in costs less accumulated amortization of $4.0 million and $1.7 million, respectively.