Note 5 - Reinsurance (Details Textual) - Maximum [Member]	9 Months Ended
Sep. 30, 2022 USD ($)
Casualty Business [Member]
Reinsurance, Amount Retained, Per Life	$ 1,000,000
Property [Member]
Reinsurance Maximum Individual Risk	$ 750,000

Amount per life of risk undertaken originally by insurer that is not ceded to reinsurer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=99397103&loc=d3e6811-158387

Name:	us-gaap_ReinsuranceRetentionAmountRetainedPerLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration