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Note 21 - Equity - Schedule of Effects of Changes in Ownership Interest Subsidiary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income / (loss) attributable to Cohen & Company Inc.	$ 11,282	$ 14,205	$ (2,054)
Increase / (decrease) in Cohen & Company Inc.'s paid in capital for the acquisition / (surrender) of additional units in consolidated subsidiary, net	(1,929)	(1,765)	28
Changes from net income / (loss) attributable to Cohen & Company Inc. and transfers (to) from non-controlling interest	$ 9,353	$ 12,440	$ (2,026)

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- Definition

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