Note 9 - Reserve for Losses and Loss Adjustment Expenses - Schedule of Incurred Losses and Allocated Loss Adjustment Expenses on Other Insurance (Details) - Other Insurance Lines [Member] $ in Thousands		Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Insurance contracts, claim expense	[1]	$ 24,381
Insurance contracts, incurred but not reported liabilities	[1]	$ 17,332
Insurance contracts, number of claims	[1]	1,459,000
Insurance contracts, claims paid and allocated claim adjustment expense	[1]	$ 3,415
Reserve for losses and loss adjustment expense, net of reinsurance	[1]	20,966
Short-Duration Insurance Contract, Prior Accident Years [Member]
Insurance contracts, claim expense		0	$ 7	$ 26	$ 48
Insurance contracts, incurred but not reported liabilities		$ 0
Insurance contracts, number of claims		7
Insurance contracts, claims paid and allocated claim adjustment expense		$ 0	0	0	0
Short-Duration Insurance Contract, Accident Year 2021 [Member]
Insurance contracts, claim expense	[1]	2,928	3,299	3,429
Insurance contracts, incurred but not reported liabilities	[1]	$ 2,073
Insurance contracts, number of claims	[1]	106,000
Insurance contracts, claims paid and allocated claim adjustment expense	[1]	$ 449	221	$ 62
Short-Duration Insurance Contract, Accident Year 2022 [Member]
Insurance contracts, claim expense	[1]	8,873	8,871
Insurance contracts, incurred but not reported liabilities	[1]	$ 6,033
Insurance contracts, number of claims	[1]	424,000
Insurance contracts, claims paid and allocated claim adjustment expense	[1]	$ 1,584	$ 481
Short-Duration Insurance Contract, Accident Year 2023 [Member]
Insurance contracts, claim expense		12,580
Insurance contracts, incurred but not reported liabilities		$ 9,226
Insurance contracts, number of claims		922,000
Insurance contracts, claims paid and allocated claim adjustment expense		$ 1,382

[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.