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Note 3 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Balance | $ 8,300 | $ 8,297 | $ 8,297
Charge-offs | (143) | (453) | (1,806)
Recoveries | 45 | 60 | 159
Provision for loan losses | 59 | 203 | 1,650
Balance | 8,261 | 8,107 | 8,300
Real Estate Construction Portfolio Segment[Member] |  |  |
Balance | 438 | 576 | 576
Charge-offs | 0 | (29) | (29)
Recoveries | 0 | 0 | 0
Provision for loan losses | (61) | (93) | (109)
Balance | 377 | 454 | 438
Consumer Real Estate Portfolio Segment [Member] |  |  |
Balance | 1,830 | 1,866 | 1,866
Charge-offs | 0 | (22) | (133)
Recoveries | 0 | 1 | 2
Provision for loan losses | (84) | (115) | 95
Balance | 1,746 | 1,730 | 1,830
Commercial Real Estate Portfolio Segment [Member] |  |  |
Balance | 3,738 | 4,109 | 4,109
Charge-offs | (30) | (124) | (488)
Recoveries | 12 | 38 | 83
Provision for loan losses | (103) | (74) | 34
Balance | 3,617 | 3,949 | 3,738
Commercial Non Real Estate Segment [Member] |  |  |
Balance | 1,063 | 655 | 655
Charge-offs | 0 | (211) | (883)
Recoveries | 4 | 0 | 10
Provision for loan losses | 75 | 308 | 1,281
Balance | 1,142 | 752 | 1,063
Public Sector and IDA Portfolio Segment[Member] |  |  |
Balance | 330 | 436 | 436
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Provision for loan losses | 87 | (25) | (106)
Balance | 417 | 411 | 330
Consumer Non Real Estate Portfolio Segment [Member] |  |  |
Balance | 644 | 627 | 627
Charge-offs | (113) | (67) | (273)
Recoveries | 29 | 21 | 64
Provision for loan losses | 56 | 3 | 226
Balance | 616 | 584 | 644
Unallocated Financing Receivables [Member] |  |  |
Balance | 257 | 28 | 28
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Provision for loan losses | 89 | 199 | 229
Balance | $ 346 | $ 227 | $ 257

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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + 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 direct write-downs of financing receivables charged against the allowance. + 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 + 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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