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Note 4 - Loans and Related Allowance for Loan and Lease Losses - Classes of the Loan Portfolio Summarized by Credit Quality (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Loans, total | $ 923,213 | $ 609,140
Commercial And Industrial [Member] |  |
Loans, total | 101,346 | 60,630
Real Estate Construction Porfolio Segment [Member] |  |
Loans, total | 47,017 | 23,709
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] |  |
Loans, total | 318,157 | 270,830
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] |  |
Loans, total | 437,947 | 249,490
Consumer Portfolio Segment [Member] |  |
Loans, total | 18,746 | 4,481
Pass [Member] |  |
Loans, total | 897,759 | 591,706
Pass [Member] | Commercial And Industrial [Member] |  |
Loans, total | 95,621 | 58,539
Pass [Member] | Real Estate Construction Porfolio Segment [Member] |  |
Loans, total | 46,995 | 23,541
Pass [Member] | Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] |  |
Loans, total | 312,176 | 264,481
Pass [Member] | Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] |  |
Loans, total | 424,225 | 240,678
Pass [Member] | Consumer Portfolio Segment [Member] |  |
Loans, total | 18,742 | 4,467
Special Mention [Member] |  |
Loans, total | 11,829 | 5,657
Special Mention [Member] | Commercial And Industrial [Member] |  |
Loans, total | 1,942 | 663
Special Mention [Member] | Real Estate Construction Porfolio Segment [Member] |  |
Loans, total |  | 144
Special Mention [Member] | Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] |  |
Loans, total | 723 | 428
Special Mention [Member] | Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] |  |
Loans, total | 9,164 | 4,422
Substandard [Member] |  |
Loans, total | 13,625 | 11,777
Substandard [Member] | Commercial And Industrial [Member] |  |
Loans, total | 3,783 | 1,428
Substandard [Member] | Real Estate Construction Porfolio Segment [Member] |  |
Loans, total | 22 | 24
Substandard [Member] | Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] |  |
Loans, total | 5,258 | 5,921
Substandard [Member] | Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] |  |
Loans, total | 4,558 | 4,390
Substandard [Member] | Consumer Portfolio Segment [Member] |  |
Loans, total | 4 | $ 14
Doubtful [Member] |  |
Loans, total |  |
Doubtful [Member] | Commercial And Industrial [Member] |  |
Loans, total |  |
Doubtful [Member] | Real Estate Construction Porfolio Segment [Member] |  |
Loans, total |  |
Doubtful [Member] | Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] |  |
Loans, total |  |
Doubtful [Member] | Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] |  |
Loans, total |  |

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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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