Note 7 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Expiry of Standby Letters of Credit Within One Year	$ 4,800
Expiry of Standby Letter of Credit Thereafter	$ 157,000
Real Estate Related Loans Representing Lease Portfolio	78.00%	77.00%
Real Estate Related Loans Representing Lease Portfolio, Excluding PPP	87.00%	86.00%
Insurance Claims [Member] \| Maximum [Member]
Loss Contingency, Estimate of Possible Loss	$ 225

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
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-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12021-110248

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