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Note 4 - Loans and Related Allowance for Loan and Lease Losses - Past Due Financing Receivables (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Loans, current balance | $ 915,131 | $ 605,703
Loans, past due | 8,082 | 3,437
Loans, total | 923,213 | 609,140
Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans, past due | 5,501 | 2,018
Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Loans, past due | 257 | 219
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans, past due | 2,324 | 1,200
Commercial And Industrial [Member] |  |
Loans, current balance | 99,633 | 60,407
Loans, past due | 1,713 | 223
Loans, total | 101,346 | 60,630
Commercial And Industrial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans, past due | 1,607 | 17
Commercial And Industrial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Loans, past due | 29 | 2
Commercial And Industrial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans, past due | 77 | 204
Real Estate Construction Porfolio Segment [Member] |  |
Loans, current balance | 47,017 | 23,709
Loans, past due | 0 | 0
Loans, total | 47,017 | 23,709
Real Estate Construction Porfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans, past due | 0 | 0
Real Estate Construction Porfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Loans, past due | 0 | 0
Real Estate Construction Porfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans, past due | 0 | 0
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] |  |
Loans, current balance | 314,866 | 268,041
Loans, past due | 3,291 | 2,789
Loans, total | 318,157 | 270,830
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] |  |
Loans, current balance | 434,879 | 249,081
Loans, past due | 3,068 | 409
Loans, total | 437,947 | 249,490
Real Estate Mortgage Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Loan [Member] |  |
Loans, past due | 1,977 | 1,909
Real Estate Mortgage Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Loans [Member] |  |
Loans, past due | 1,907 | 92
Real Estate Mortgage Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Loan [Member] |  |
Loans, past due | 227 | 207
Real Estate Mortgage Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Loans [Member] |  |
Loans, past due | 1 |
Real Estate Mortgage Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Loan [Member] |  |
Loans, past due | 1,087 | 673
Real Estate Mortgage Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Loans [Member] |  |
Loans, past due | 1,160 | 317
Consumer Portfolio Segment [Member] |  |
Loans, current balance | 18,736 | 4,465
Loans, past due | 10 | 16
Loans, total | 18,746 | 4,481
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans, past due | 10 |
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Loans, past due |  | 10
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans, past due |  | $ 6

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- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 + Details
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