Note 10 - Acquisition of Corporate Trust Business (Details Textual)	Mar. 17, 2022 USD ($)
Trustmark [Member]
Business Combination, Consideration Transferred, Total	$ 650,000

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
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-URI https://asc.fasb.org/extlink&oid=126966197&loc=d3e6578-128477

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Balance Type:	credit
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