Note 7 - Deferred Acquisition Costs (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Deferred Policy Acquisition Costs, Impairment Loss	$ 0	$ 0

Amount of impairment loss for deferred policy acquisition costs.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 30
-URI http://asc.fasb.org/subtopic&trid=4737841

Name:	us-gaap_DeferredPolicyAcquisitionCostsImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration