Note 17 - Equity - Schedule of Effects of Changes in Ownership Interest Subsidiary (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income (loss) attributable to Cohen & Company Inc.	$ 2,023	$ (2,637)
Increase / (decrease) in Cohen & Company Inc. paid in capital for the acquisition / (surrender) of additional units in consolidated subsidiary, net	447	582
Changes from net income / (loss) attributable to Cohen & Company Inc. and transfers (to) from the non-controlling interest	$ 2,470	$ (2,055)