Note 6 - Investments - Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
US Government Agencies Debt Securities [Member]
Less than 12 months, estimated fair value	$ 12,077	$ 511
Less than 12 Months	84	0
Greater than 12 months, estimated fair value	0	0
Greater than 12 Months	0	0
Estimated fair value	12,077	511
Total, debt securities	84	0
US States and Political Subdivisions Debt Securities [Member]
Less than 12 months, estimated fair value	846
Less than 12 Months	5
Greater than 12 months, estimated fair value	0
Greater than 12 Months	0
Estimated fair value	846
Total, debt securities	5
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Less than 12 months, estimated fair value	5,388	834
Less than 12 Months	68	6
Greater than 12 months, estimated fair value	0	0
Greater than 12 Months	0	0
Estimated fair value	5,388	834
Total, debt securities	68	6
Fixed Maturities [Member]
Less than 12 months, estimated fair value	26,298	1,345
Less than 12 Months	290	6
Greater than 12 months, estimated fair value	0	0
Greater than 12 Months	0	0
Estimated fair value	26,298	1,345
Total, debt securities	290	$ 6
Asset-backed Securities [Member]
Less than 12 months, estimated fair value	445
Less than 12 Months	4
Greater than 12 months, estimated fair value	0
Greater than 12 Months	0
Estimated fair value	445
Total, debt securities	4
Corporate Debt Securities [Member]
Less than 12 months, estimated fair value	7,542
Less than 12 Months	129
Greater than 12 months, estimated fair value	0
Greater than 12 Months	0
Estimated fair value	7,542
Total, debt securities	$ 129

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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