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Note 4 - Loan Receivables and Allowance for Loan Losses - Allowance for Loan Losses to Loan Portfolio Segment (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015
Loans receivable, gross: Individually evaluated for impairment |  |  |  | $ 8,951 | $ 12,851
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | (572,706) | (471,518)
Loans receivable, gross |  |  |  | 581,657 | 484,369
Balance | $ 5,242 | $ 4,924 | $ 5,681 |  |
Charge-offs | (3,180) | (32) | (867) |  |
Recoveries | 149 | 100 | 110 |  |
Provision | 2,464 | 250 |  |  |
Balance | 4,675 | 5,242 | 4,924 |  |
Loans receivable, net |  |  |  | 576,982 | 479,127
Allowance for loan losses: Individually evaluated for impairment |  |  |  | 231 | 3
Allowance for loan losses: Collectively evaluated for impairment |  |  |  | 4,444 | 5,239
Total Allowance for loan losses | 4,675 | 5,242 | 4,924 | 4,675 | 5,242
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | 572,706 | 471,518
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Loans receivable, gross: Individually evaluated for impairment |  |  |  | 6,267 | 7,745
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | (264,962) | (238,083)
Loans receivable, gross |  |  |  | 271,229 | 245,828
Balance | 1,970 | 1,204 | 1,406 |  |
Charge-offs |  | 0 | (297) |  |
Recoveries | 80 | 35 | 60 |  |
Provision | (197) | 731 | 35 |  |
Balance | 1,853 | 1,970 | 1,204 |  |
Loans receivable, net |  |  |  | 269,376 | 243,858
Allowance for loan losses: Individually evaluated for impairment |  |  |  |  |
Allowance for loan losses: Collectively evaluated for impairment |  |  |  | 1,853 | 1,970
Total Allowance for loan losses | 1,970 | 1,970 | 1,204 | 1,853 | 1,970
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | 264,962 | 238,083
Residential Portfolio Segment [Member] |  |  |  |  |
Loans receivable, gross: Individually evaluated for impairment |  |  |  | 1,911 | 4,556
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | (84,603) | (106,281)
Loans receivable, gross |  |  |  | 86,514 | 110,837
Balance | 740 | 949 | 974 |  |
Charge-offs | (190) | (16) | (195) |  |
Recoveries | 1 |  | 30 |  |
Provision | (17) | (193) | 140 |  |
Balance | 534 | 740 | 949 |  |
Loans receivable, net |  |  |  | 85,980 | 110,097
Allowance for loan losses: Individually evaluated for impairment |  |  |  |  |
Allowance for loan losses: Collectively evaluated for impairment |  |  |  | 534 | 740
Total Allowance for loan losses | 740 | 740 | 949 | 534 | 740
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | 84,603 | 106,281
Commercial Portfolio Segment [Member] |  |  |  |  |
Loans receivable, gross: Individually evaluated for impairment |  |  |  | 231 |
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | (60,746) | (59,752)
Loans receivable, gross |  |  |  | 60,977 | 59,752
Balance | 1,027 | 1,753 | 2,285 |  |
Charge-offs | (2,977) | 0 | (49) |  |
Recoveries | 66 | 49 | 6 |  |
Provision | 2,624 | (775) | (489) |  |
Balance | 740 | 1,027 | 1,753 |  |
Loans receivable, net |  |  |  | 60,237 | 58,725
Allowance for loan losses: Individually evaluated for impairment |  |  |  | 231 |
Allowance for loan losses: Collectively evaluated for impairment |  |  |  | 509 | 1,027
Total Allowance for loan losses | 1,027 | 1,027 | 1,753 | 740 | 1,027
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | 60,746 | 59,752
Consumer Portfolio Segment [Member] |  |  |  |  |
Loans receivable, gross: Individually evaluated for impairment |  |  |  | 542 | 550
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | (100,907) | (46,971)
Loans receivable, gross |  |  |  | 101,449 | 47,521
Balance | 677 | 638 | 534 |  |
Charge-offs | (13) | (16) | (66) |  |
Recoveries | 2 | 11 | 4 |  |
Provision | (25) | 44 | 166 |  |
Balance | 641 | 677 | 638 |  |
Loans receivable, net |  |  |  | 100,808 | 46,844
Allowance for loan losses: Individually evaluated for impairment |  |  |  |  | 3
Allowance for loan losses: Collectively evaluated for impairment |  |  |  | 641 | 674
Total Allowance for loan losses | 677 | 677 | 638 | 641 | 677
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | 100,907 | 46,971
Construction Portfolio Segment [Member] |  |  |  |  |
Loans receivable, gross: Individually evaluated for impairment |  |  |  |  |
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | (53,895) | (15,551)
Loans receivable, gross |  |  |  | 53,895 | 15,551
Balance | 486 | 49 | 260 |  |
Charge-offs |  |  | (260) |  |
Recoveries |  |  | 10 |  |
Provision | 226 | 437 | 39 |  |
Balance | 712 | 486 | 49 |  |
Loans receivable, net |  |  |  | 53,183 | 15,065
Allowance for loan losses: Individually evaluated for impairment |  |  |  |  |
Allowance for loan losses: Collectively evaluated for impairment |  |  |  | 712 | 486
Total Allowance for loan losses | 486 | 486 | 49 | 712 | 486
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | 53,895 | 15,551
Construction to Permanent Portfolio Segment [Member] |  |  |  |  |
Loans receivable, gross: Individually evaluated for impairment |  |  |  |  |
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | (7,593) | (4,880)
Loans receivable, gross |  |  |  | 7,593 | 4,880
Balance | 123 | 179 | 25 |  |
Charge-offs |  |  |  |  |
Recoveries | 0 | 5 |  |  |
Provision | (54) | (61) | 154 |  |
Balance | 69 | 123 | 179 |  |
Loans receivable, net |  |  |  | 7,524 | 4,757
Allowance for loan losses: Individually evaluated for impairment |  |  |  |  |
Allowance for loan losses: Collectively evaluated for impairment |  |  |  | 69 | 123
Total Allowance for loan losses | 123 | 123 | 179 | 69 | 123
Loans receivable, gross: Collectively evaluated for impairment |  |  |  | 7,593 | 4,880
Unallocated Financing Receivables [Member] |  |  |  |  |
Loans receivable, gross: Individually evaluated for impairment |  |  |  |  |
Loans receivable, gross: Collectively evaluated for impairment |  |  |  |  |
Loans receivable, gross |  |  |  |  |
Balance | 219 | 152 | 197 |  |
Charge-offs | 0 | 0 |  |  |
Recoveries | 0 | 0 |  |  |
Provision | (93) | 67 | (45) |  |
Balance | 126 | 219 | 152 |  |
Loans receivable, net |  |  |  | (126) | (219)
Allowance for loan losses: Individually evaluated for impairment |  |  |  |  |
Allowance for loan losses: Collectively evaluated for impairment |  |  |  | 126 | 219
Total Allowance for loan losses | $ 219 | $ 219 | $ 152 | 126 | 219
Loans receivable, gross: Collectively evaluated for impairment |  |  |  |  |

X
- 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=66008989&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=66008989&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 valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + 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=66008989&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + 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 (h) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + 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 (h) -URI http://asc.fasb.org/extlink&oid=66008989&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=66008989&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=66008989&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=6379141&loc=d3e15032-111544 + Details
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