v3.23.2
Note 14 - Merom Acquisition (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Feb. 14, 2022
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Mar. 31, 2023
Operating Expenses   $ 22,244 $ (816) $ 51,477 $ (9,493)  
Merom Acquisition [Member]            
Capacity Payment Reductions $ 15,000          
Purchase Obligation, Total 7,200          
Business Acquisition, Purchase of Coal Inventory 17,000          
Business Acquisition, Purchase of Coal Inventory, Initial Payment 5,400          
Business Acquisition, Transaction Costs 2,900          
Contract with Customer, Liability 184,500         $ 113,800
Contract with Customer, Liability, Revenue Recognized   19,600   52,900    
Contract with Customer, Asset, after Allowance for Credit Loss $ 34,300          
Operating Expenses   13,000   30,700    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory   $ 6,800   $ 11,200