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Note 5 - Loans Receivable and Allowance for Loan Losses - Non-accrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Business Activities Loans [Member]
Non-accruing loans	$ 6,464	$ 3,778
Acquired Loans [Member]
Non-accruing loans	113
Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Non-accruing loans	2,137
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member]
Non-accruing loans	56
Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Non-accruing loans	3,222	3,028
Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Non-accruing loans	1,025	748
Commercial Portfolio Segment [Member] | Acquired Loans [Member]
Non-accruing loans	48
Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Non-accruing loans	80	2
Consumer Portfolio Segment [Member] | Acquired Loans [Member]
Non-accruing loans	9
Substandard [Member] | Business Activities Loans [Member]
Non-accruing loans	6,464	3,778
Substandard [Member] | Acquired Loans [Member]
Non-accruing loans	113
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Non-accruing loans	2,137
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member]
Non-accruing loans	56
Substandard [Member] | Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Non-accruing loans	3,222	3,028
Substandard [Member] | Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Non-accruing loans	1,025	748
Substandard [Member] | Commercial Portfolio Segment [Member] | Acquired Loans [Member]
Non-accruing loans	48
Substandard [Member] | Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Non-accruing loans	80	2
Substandard [Member] | Consumer Portfolio Segment [Member] | Acquired Loans [Member]
Non-accruing loans	9
Substandard [Member] | Non-Accrual Loans [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	6,464	3,778
Performing (accruing) loans, current	0	0
Substandard [Member] | Non-Accrual Loans [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	113
Performing (accruing) loans, current	0
Substandard [Member] | Non-Accrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	2,137
Performing (accruing) loans, current	0
Substandard [Member] | Non-Accrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	56
Performing (accruing) loans, current	0
Substandard [Member] | Non-Accrual Loans [Member] | Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	3,222	3,028
Performing (accruing) loans, current	0	0
Substandard [Member] | Non-Accrual Loans [Member] | Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	1,025	748
Performing (accruing) loans, current	0	0
Substandard [Member] | Non-Accrual Loans [Member] | Commercial Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	48
Performing (accruing) loans, current	0
Substandard [Member] | Non-Accrual Loans [Member] | Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	80	2
Performing (accruing) loans, current	0	0
Substandard [Member] | Non-Accrual Loans [Member] | Consumer Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	9
Performing (accruing) loans, current	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Consumer Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	80
Financing Receivables, 60 to 89 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due
Financing Receivables, 60 to 89 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due		0
Financing Receivables, 60 to 89 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	80
Financing Receivables, 60 to 89 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Consumer Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	6,384	3,778
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	113
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	2,137
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	56
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	3,222	3,028
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due	1,025	748
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Commercial Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	48
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Performing (accruing) loans, past due		$ 2
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] | Non-Accrual Loans [Member] | Consumer Portfolio Segment [Member] | Acquired Loans [Member]
Performing (accruing) loans, past due	$ 9

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- Definition

Financing receivables that are current.

+ References

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-Topic 310
-SubTopic 10
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+ References

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-Topic 310
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