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Note 5 - Loans Receivable and Credit Disclosures (Details Textual) | 12 Months Ended
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Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Loans and Leases Receivable, Gross, Total |  | $ 1,147,577,000 | $ 1,060,846,000
Loans and Leases Receivable, Deferred Income, Total | [1] | 857,000 | 80,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans |  | 975,000 | 473,000
Financing Receivable, Nonaccrual |  | 15,273,000 | 4,788,000
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down |  | 31,000 | 315,000
Financing Receivable, Troubled Debt Restructuring |  | $ 11,293,000 | $ 1,171,000
Number Of Restructured Loans Granting Concessions |  | 4 | 1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts |  | 0 | 0
Financing Receivable, Modifications, Principal Balance, Number of Contracts |  | 24 |
Financing Receivable Modifications, Principal Balance |  | $ 45,900,000 |
Financing Receivable Modifications Principal Balance Amount Still On Deferral |  | 572,000 |
Commercial Portfolio Segment [Member] |  |  |
Loans and Leases Receivable, Gross, Total | [2] | 122,535,000 | $ 84,084,000
SBA CARES Act Paycheck Protection Program Member |  |  |
Loans and Leases Receivable, Deferred Income, Total |  | 900,000 |
SBA CARES Act Paycheck Protection Program Member | Commercial Portfolio Segment [Member] |  |  |
Loans and Leases Receivable, Gross, Total |  | $ 50,900,000 |
[1] | Deferred loan fees as of December 31, 2020 includes $0.9 million of fees related to the PPP loans.
[2] | Commercial loan portfolio as of December 31, 2020 includes $50.9 million Paycheck Protection Program ("PPP") loans

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- Definition Represents amount still on deferral for principal balance of financing receivable modifications. + References No definition available. + Details
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- Definition Represents number of loan modifications that are not considered TDRs. + References No definition available. + Details
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- Definition The number of restructured loans granting concessions to borrowers experiencing financial difficulties. + References No definition available. + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
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- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524 + Details
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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
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- Definition Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=121568338&loc=d3e45377-112738 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159169&loc=d3e10152-111534 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 + Details
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