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Note 2 - Sale of a Subsidiary and Discontinued Operations (Details Textual) - Klein Marine Services, Inc. [Member] - USD ($)
$ in Thousands
12 Months Ended
Aug. 21, 2023
Jan. 31, 2025
Jan. 31, 2024
Disposal Group, Including Discontinued Operation, Consideration $ 10,800    
Gain (Loss) on Disposition of Business $ 2,300 $ (0) $ 2,343