Note 4 - Reserve for Losses and Loss Adjustment Expenses - Reconciliation of Changes in Reserve Balance for Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Reserve for losses and LAE net of reinsurance recoverables at beginning of period	$ 97,653	$ 77,520
Current year	26,333	17,300
Prior years	504	3,352
Total incurred	26,837	20,652
Current year	4,895	1,393
Prior years	9,432	15,413
Total payments	14,327	16,806
Reserve for losses and LAE net of reinsurance recoverables at end of period	110,163	81,366
Add: Reinsurance recoverables on unpaid losses and LAE at end of period	292,024	183,601	$ 244,622
Reserve for losses and LAE gross of reinsurance recoverables on unpaid losses and LAE at end of period	$ 402,187	$ 264,967	$ 342,275