Note 13 - Coronavirus (Covid-19) Outbreak / Subsequent Events (Details Textual) - USD ($)	1 Months Ended	3 Months Ended
Apr. 30, 2020	Mar. 31, 2020	Mar. 31, 2019
Provision for Loan, Lease, and Other Losses, Total		$ 1,528,000	$ (957,000)
Subsequent Event [Member]
Financing Receivable, Paycheck Protection Program Under CARES Act Loan, Total	$ 84,478,000
Financing Receivable, Paycheck Protection Program Under CARES Act Loan, Additional Approved Amount	11,709,000
Loan Processing Fee Income	$ 3,106,000
Financial Assets Facing Additional Credit Deterioration Due to Economic Impact of Covid-19 [Member]
Provision for Loan, Lease, and Other Losses, Total		$ 402,000

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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