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Note 2 - Acquisitions - Provisional Amounts for Acquired Assets and Liabilities (Details) - Swire Pacific Offshore Holdings Ltd. [Member] - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Apr. 22, 2022
Assets      
Cash     $ 33,152
Trade and other receivables     64,621
Marine operating supplies     5,122
Assets held for sale     2,500
Prepaid expenses and other current assets     4,174
Net properties and equipment $ 174,400   174,415
Indemnification assets (A) $ 11,946 $ 17,370 32,279
Other assets     1,153
Total assets     317,416
Accounts payable     1,594
Accrued expenses     54,924
Other current liabilities     28,511
Other liabilities     16,886
Total liabilities     101,915
Net assets acquired     $ 215,501