Note 8 - Liability for Unpaid Losses and Loss Adjustment Expenses - Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance (Unaudited) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	$ 32,968
Reinsurance Agreement [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	0
Short-duration Insurance Contracts, Accident Year 2012 [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	350	$ 350	$ 361	$ 365	$ 418	$ 429	$ 450	$ 393	$ 763
Short-duration Insurance Contracts, Accident Year 2013 [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	818	818	842	926	1,160	1,166	1,340	1,585
Short-duration Insurance Contracts, Accident Year 2014 [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	2,012	2,012	2,082	2,743	2,641	2,562	2,640
Short-duration Insurance Contracts, Accident Year 2015 [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	4,381	4,232	4,768	3,859	4,290	4,485
Short-duration Insurance Contracts, Accident Year 2016 [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	3,473	3,413	3,963	3,927	4,495
Short-duration Insurance Contracts, Accident Year 2017 [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	7,370	7,305	7,846	7,647
Short-duration Insurance Contracts, Accident Year 2018 [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	6,521	5,981	6,523
Short-Duration Insurance Contract, Accident Year 2019 [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	5,582	4,964
Short-Duration Insurance Contract, Accident Year 2020 [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	2,457	1,864
Short-Duration Insurance Contract, Accident Year 2021 [Member]
Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance	$ 4