Note 9 - Reserve for Losses and Loss Adjustment Expenses - Reconciliation of Liability for Claims and Claim Adjustments Expenses (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reserve for losses and loss adjustment expense, net of reinsurance		$ 97,653	$ 77,520	$ 45,419	$ 34,470
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		342,275	$ 231,415	$ 173,366
Property Lines [Member]
Reserve for losses and loss adjustment expense, net of reinsurance		43,326
Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period		84,778
Other Liability Occurrence [Member]
Reserve for losses and loss adjustment expense, net of reinsurance		13,304
Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period		6,975
Other Liability Claims [Member]
Reserve for losses and loss adjustment expense, net of reinsurance		20,966
Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period		71,201
Reinsurance Nonproportional Assumed Property [Member]
Reserve for losses and loss adjustment expense, net of reinsurance	[1]	8,379
Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period		81,668
Insurance, Other [Member]
Reserve for losses and loss adjustment expense, net of reinsurance		11,678
Add: Reinsurance recoverables on unpaid losses and loss adjustment expenses at end of period		$ 244,622

[1] Reflects the Company’s share of Loss and Loss Adjustment Expense related to non-proportional assumed reinsurance business. This amount reflects gross and net reserves related to this treaty and the ultimate incurred amount reflects IBNR only. The Company does not have direct access to individual claim information underlying the assumed quota arrangement. The Company does not use claim frequency information in the determination of loss reserves or for other internal purposes. Based on these considerations, the Company does not believe providing claims frequency information is practicable as it relates to this line of business.