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Note 4 - Allowance for Loan Losses - Segregated by Class of Loan (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Allowance for loan losses, beginning balance |  |  | $ 8,923 | $ 8,604
Allowance for loan losses, charge-offs |  |  | (2,283) | (1,749)
Allowance for loan losses, recoveries |  |  | 1,002 | 1,286
Allowance for loan losses, provision |  | $ 354 | 335 | 1,062
Allowance for loan losses, ending balance | 7,977 | 9,203 | 7,977 | 9,203
Commercial [Member] | Commercial and Agricultural Portfolio Segment [Member] |  |  |  |
Allowance for loan losses, beginning balance |  |  | 456 | 855
Allowance for loan losses, charge-offs |  |  | (215) | (291)
Allowance for loan losses, recoveries |  |  | 124 | 54
Allowance for loan losses, provision |  |  | 71 | (127)
Allowance for loan losses, ending balance | 436 | 491 | 436 | 491
Commercial [Member] | Real Estate Portfolio Segment [Member] |  |  |  |
Allowance for loan losses, beginning balance |  |  | 5,751 | 3,851
Allowance for loan losses, charge-offs |  |  | (966) | (992)
Allowance for loan losses, recoveries |  |  | 523 | 197
Allowance for loan losses, provision |  |  | (1,085) | 2,231
Allowance for loan losses, ending balance | 4,223 | 5,287 | 4,223 | 5,287
Agricultural [Member] | Commercial and Agricultural Portfolio Segment [Member] |  |  |  |
Allowance for loan losses, beginning balance |  |  | 168 | 203
Allowance for loan losses, charge-offs |  |  | (160) | (18)
Allowance for loan losses, recoveries |  |  | 3 | 3
Allowance for loan losses, provision |  |  | 238 | 93
Allowance for loan losses, ending balance | 249 | 281 | 249 | 281
Commercial Construction [Member] | Real Estate Portfolio Segment [Member] |  |  |  |
Allowance for loan losses, beginning balance |  |  | 323 | 691
Allowance for loan losses, charge-offs |  |  | (49) | (25)
Allowance for loan losses, recoveries |  |  | 241 | 813
Allowance for loan losses, provision |  |  | 473 | (1,021)
Allowance for loan losses, ending balance | 988 | 458 | 988 | 458
Residential Construction [Member] | Real Estate Portfolio Segment [Member] |  |  |  |
Allowance for loan losses, beginning balance |  |  | 13 | 20
Allowance for loan losses, charge-offs |  |  |  |
Allowance for loan losses, recoveries |  |  |  |
Allowance for loan losses, provision |  |  | (7) | 2
Allowance for loan losses, ending balance | 6 | 22 | 6 | 22
Residential [Member] | Real Estate Portfolio Segment [Member] |  |  |  |
Allowance for loan losses, beginning balance |  |  | 1,396 | 1,990
Allowance for loan losses, charge-offs |  |  | (648) | (243)
Allowance for loan losses, recoveries |  |  | 47 | 32
Allowance for loan losses, provision |  |  | 334 | (114)
Allowance for loan losses, ending balance | 1,129 | 1,665 | 1,129 | 1,665
Farmland [Member] | Real Estate Portfolio Segment [Member] |  |  |  |
Allowance for loan losses, beginning balance |  |  | 722 | 912
Allowance for loan losses, charge-offs |  |  | (61) |
Allowance for loan losses, recoveries |  |  | 2 | 137
Allowance for loan losses, provision |  |  | 209 | (187)
Allowance for loan losses, ending balance | 872 | 862 | 872 | 862
Consumer [Member] | Consumer and Other Portfolio Segment [Member] |  |  |  |
Allowance for loan losses, beginning balance |  |  | 80 | 63
Allowance for loan losses, charge-offs |  |  | (184) | (180)
Allowance for loan losses, recoveries |  |  | 60 | 44
Allowance for loan losses, provision |  |  | 100 | 176
Allowance for loan losses, ending balance | 56 | 103 | 56 | 103
Other [Member] | Consumer and Other Portfolio Segment [Member] |  |  |  |
Allowance for loan losses, beginning balance |  |  | 14 | 19
Allowance for loan losses, charge-offs |  |  |  |
Allowance for loan losses, recoveries |  |  | 2 | 6
Allowance for loan losses, provision |  |  | 2 | 9
Allowance for loan losses, ending balance | $ 18 | $ 34 | $ 18 | $ 34

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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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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 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://www.xbrl.org/2003/role/presentationRef -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 2: http://www.xbrl.org/2003/role/presentationRef -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 3: http://www.xbrl.org/2003/role/presentationRef -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 4: http://www.xbrl.org/2003/role/presentationRef -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 Reference 5: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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