Note 17 - Fair Value of Financial Instruments - Credit Loss Roll Forward for Trust Preferred Securities Classified with Other Than Temporary Impairment (Details) - Trust Preferred Securities Debt [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Ending balance, December 31, 2022	$ 173
Additions not previously recognized	0
Ending balance, December 31, 2023	$ 173