Note 2 - Basis of Presentation (Details Textual) - New Issue and Advisory [Member] - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Revenue from Contract with Customer, Excluding Assessed Tax	$ 45,711	$ 20,164
Reclassification, Segmentation Basis Change [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 13,075

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details