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Note 8 - Noncash Investing and Financing Activities (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Noncash or Part Noncash Acquisition, Fixed Assets Acquired $ 68.5 $ 22.2 $ 36.1