Note 10 - Restrictions on Dividends (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries	$ 20,000,000	$ 12,000,000
Period of Restriction on Retained Net Income Without Prior Approval (Year)	2 years
Minimum [Member]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval	$ 5,743,000