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Note 1 - General and Basis of Presentation - Fair Value of Amounts of Identified Assets and Liabilities Assumed in a Business Combination (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Jan. 04, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Goodwill |  | $ 151,122 |  | $ 90,544
Purchase Agreement With Enel Green Power North America [Member] |  |  |  |
Trade receivables and others (1) | [1] |  | $ 4,400 |
Deferred income taxes |  |  | 3,100 |
Property, plant and equipment and construction-in-process (2) | [2] |  | 197,700 |
Operating lease right of use |  |  | 1,200 |
Other long-term assets |  |  | 200 |
Intangible assets (3) | [3] |  | 23,600 |
Goodwill | [4] |  | 60,700 |
Total assets acquired |  |  | 290,900 |
Accounts payable, accrued expenses and others |  |  | 1,500 |
Other current liabilities |  |  | 1,800 |
Operating lease liabilities |  |  | 1,200 |
Other long-term liabilities |  |  | 5,000 |
Asset retirement obligation |  |  | 6,800 |
Total liabilities assumed |  |  | 16,300 |
Total assets acquired, and liabilities assumed, net |  |  | $ 274,600 |
[1] | The gross amount of trade receivables was fully collected subsequent to acquisition date.
[2] | The fair value of Property, Plant and equipment was estimated by applying the income approach and utilizing the discounted cash flow method. This methodology assesses the value of tangible assets by computing the anticipated cash flows expected to be generated by the respective assets.
[3] | Intangible assets are related to the long-term electricity PPAs described above and are amortized over the term of those PPAs. The fair value of the intangible assets was estimated by applying the income approach and utilizing the Comparative Method of discounted cash flow.
[4] | Goodwill is primarily related to the expected synergies, potential cost savings in operations as a result of the purchase transaction as well as potential future development of the greenfield assets. The goodwill is allocated to the Electricity segment and is deductible for tax purposes.

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