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Note 5 - Loans and Leases and Allowance for Loan and Lease Losses (Details Textual) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) | Dec. 31, 2017 USD ($)
Number of Portfolio Segments | 8 |
Loans Pledged as Collateral | $ 27,000,000 | $ 0
Loans and Leases Receivable, Related Parties, Ending Balance | 800,000 | 500,000
Loans and Leases Receivable, Related Parties, Additions | 500,000 | 0
Loans and Leases Receivable, Related Parties, Proceeds | 200,000 | 11,000
Loans and Leases Receivable, Gross, Total | 531,198,000 | 357,458,000
Financing Receivable, Recorded Investment, Nonaccrual Status | 3,782,000 | 2,148,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 2,238,000 |
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans | 26,000 | 19,000
Interest Income Recorded | 3,000 | 3,000
Financing Receivable, Restructuring Recorded Investment With Nonaccrual Status | 100,000 | 100,000
Financing Receivable, Modifications, Recorded Investment | $ 0 | $ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 0 | 0
Loans Modified in a Troubled Debt Restructuring, Individually Evaluated for Impairment, Principal Balance, Threshold | $ 500,000 |
Allowance for Credit Losses, Change in Method of Calculating Impairment | 2,000 | $ 2,000
Minimum [Member] |  |
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest | 500,000 |
Minimum [Member] | ALC [Member] |  |
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest | 100,000 |
Financial Asset Acquired with Credit Deterioration [Member] |  |
Loans and Leases Receivable, Gross, Total | 2,238,000 |
Financing Receivable, Recorded Investment, Nonaccrual Status | 2,200,000 |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 2,200,000 |
Financial Asset Acquired with Credit Deterioration [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans and Leases Receivable, Gross, Total | 200,000 |
Financial Asset Acquired with Credit Deterioration [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans and Leases Receivable, Gross, Total | 2 |
Financial Asset Acquired with Credit Deterioration [Member] | Substandard [Member] |  |
Loans and Leases Receivable, Gross, Total | $ 2,200,000 |
Real Estate [Member] |  |
Percentage of Loan Portfolio | 63.60% | 54.00%

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- Definition Represents the threshold used in determining which loans that have been modified in a troubled debt restructuring are considered impaired and evaluated individually for impairment. All such loans with a principal balance above this threshold are considered impaired and evaluated individually for impairment. + References No definition available. + Details
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- Definition Represents the number of portfolio segments into which the Company has divided the loan portfolio as of the balance sheet date. + References No definition available. + Details
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- Definition Amount of allowance for credit losses related to receivables which had been measured under a general allowance for credit losses methodology that are now identified as troubled debt restructurings. + References No definition available. + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + 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=82895541&loc=d3e18845-111554 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
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- Definition Amount of investment in impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + 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=82891408&loc=d3e4428-111522 + Details
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- Definition Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18794-111554 + Details
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- Definition Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
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- Definition Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5086-111524 + Details
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