Note 9 - Reserve for Losses and Loss Adjustment Expenses - Reconciliation of Changes in Reserve Balance for Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reserve for losses and loss adjustment expense, net of reinsurance recoverables at beginning of period	$ 77,520	$ 45,419	$ 34,470
Current year	70,363	76,289	45,042
Prior years	2,229	2,383	(3,585)
Total incurred	72,592	78,672	41,457
Current year	19,631	21,802	12,063
Prior years	32,828	24,769	18,445
Total payments	52,459	46,571	30,508
Reserve for losses and loss adjustment expense net of reinsurance recoverables at end of period	97,653	77,520	45,419
Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period	244,622	153,895	127,947
Reserve for losses and loss adjustment expenses gross of reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period	$ 342,275	$ 231,415	$ 173,366