Note 13 - Related Party Transactions (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Bimini Advisors LLC [Member]
Automatic Renewal Period Of Management Agreement (Year)	1 year
Bimini Capital Management Inc [Member]
Management Fee and Overhead Expense	$ 13.0	$ 9.8	$ 6.8
Entity Shares Owned (in shares)	569,071
Entity Ownership Percentage	1.50%