Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Jan. 01, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Equity, Attributable to Parent	$ 934,094	$ 894,535	$ 874,711		$ 858,103	$ 806,918	$ 808,082	$ 794,368	$ 760,432
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2023-02 [Member]
Equity, Attributable to Parent				$ 2,500