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Note 8 - Loans and Related Allowance for Loan and Lease Losses - Allowance for Loan Losses (Details) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2018 | Dec. 31, 2017
Individually evaluated for impairment |  |  | $ 1,877,000 | $ 1,567,000
Collectively evaluated for impairment |  |  | 5,674,000 | 5,623,000
Total ending allowance balance | $ 7,551,000 | $ 6,598,000 | 7,551,000 | 7,190,000
ALLL balance, period start | 7,190,000 | 6,598,000 |  |
Charge-offs | (13,000) | (208,000) |  |
Recoveries | 164,000 | 165,000 |  |
Provision for Loan, Lease, and Other Losses, Total | 210,000 | 165,000 |  |
ALLL balance, period end | 7,551,000 | 6,720,000 |  |
Commercial And Industrial [Member] |  |  |  |
Individually evaluated for impairment |  |  | 997,000 | 694,000
Collectively evaluated for impairment |  |  | 259,000 | 305,000
Total ending allowance balance | 1,256,000 | 448,000 | 1,256,000 | 999,000
ALLL balance, period start | 999,000 | 448,000 |  |
Charge-offs | (9,000) | (20,000) |  |
Recoveries | 109,000 | 78,000 |  |
Provision for Loan, Lease, and Other Losses, Total | 157,000 | 110,000 |  |
ALLL balance, period end | 1,256,000 | 616,000 |  |
Real Estate Construction Porfolio Segment [Member] |  |  |  |
Individually evaluated for impairment |  |  |  |
Collectively evaluated for impairment |  |  | 92,000 | 313,000
Total ending allowance balance | 92,000 | 172,000 | 92,000 | 313,000
ALLL balance, period start | 313,000 | 172,000 |  |
Charge-offs |  |  |  |
Recoveries | 17,000 | 17,000 |  |
Provision for Loan, Lease, and Other Losses, Total | (238,000) | (3,000) |  |
ALLL balance, period end | 92,000 | 186,000 |  |
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] |  |  |  |
Individually evaluated for impairment |  |  | 124,000 | 140,000
Collectively evaluated for impairment |  |  | 1,658,000 | 1,620,000
Total ending allowance balance | 1,782,000 | 2,818,000 | 1,782,000 | 1,760,000
ALLL balance, period start | 1,760,000 | 2,818,000 |  |
Charge-offs |  | (68,000) |  |
Recoveries | 20,000 | 7,000 |  |
Provision for Loan, Lease, and Other Losses, Total | 2,000 | (234,000) |  |
ALLL balance, period end | 1,782,000 | 2,523,000 |  |
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] |  |  |  |
Individually evaluated for impairment |  |  | 756,000 | 733,000
Collectively evaluated for impairment |  |  | 3,567,000 | 3,303,000
Total ending allowance balance | 4,323,000 | 3,135,000 | 4,323,000 | 4,036,000
ALLL balance, period start | 4,036,000 | 3,135,000 |  |
Charge-offs |  | (19,000) |  |
Recoveries |  |  |  |
Provision for Loan, Lease, and Other Losses, Total | 287,000 | 262,000 |  |
ALLL balance, period end | 4,323,000 | 3,378,000 |  |
Consumer Portfolio Segment [Member] |  |  |  |
Individually evaluated for impairment |  |  |  |
Collectively evaluated for impairment |  |  | 98,000 | 82,000
Total ending allowance balance | 98,000 | 25,000 | $ 98,000 | $ 82,000
ALLL balance, period start | 82,000 | 25,000 |  |
Charge-offs | (4,000) | (101,000) |  |
Recoveries | 18,000 | 63,000 |  |
Provision for Loan, Lease, and Other Losses, Total | 2,000 | 30,000 |  |
ALLL balance, period end | $ 98,000 | $ 17,000 |  |

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: 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(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance 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(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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