Note 18 - Equity - Shares Outstanding of Stockholders' Equity of the Company (Details) - Cohen & Company [Member] - Common Stock [Member]	9 Months Ended
	Sep. 30, 2021 shares
Shares, outstanding (in shares)	1,038,963
Issuance of Common Stock (in shares)	300,859
Vesting of shares (in shares)	58,649
Shares withheld for employee taxes and retired (in shares)	(21,777)
Repurchase and retirement of Common Stock (in shares)	(49,544)
Shares, outstanding (in shares)	1,327,150