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Note 3 - Investment Securities (Details) - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014 | Dec. 31, 2013
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Note 3 - Investment Securities (Details) - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity [Line Items] |  |  |
Due in one year or less | $ 1,070 | $ 120 |
Due in one year or less | 1,074 | 121 |
Due in one year or less | 0 | 0 |
Due in one year or less | 0 | 0 |
Due after one year through five years | 17,306 | 15,679 |
Due after one year through five years | 17,354 | 15,786 |
Due after one year through five years | 0 | 0 |
Due after one year through five years | 0 | 0 |
Due after five years through ten years | 19,267 | 20,366 |
Due after five years through ten years | 19,604 | 20,852 |
Due after five years through ten years |  | 0 |
Due after five years through ten years |  | 0 |
Due after ten years | 12,745 | 14,149 |
Due after ten years | 13,052 | 14,703 |
Due after ten years | 0 | 0 |
Due after ten years | 0 | 0 |
| 96,253 | 50,314 |
| 51,084 | 51,462 |
| 0 | 0 |
| 0 | 0 |
Mortgage-backed securities and CMO | 45,865 | 46,596 |
Mortgage-backed securities and CMO | 45,800 | 46,681 |
Mortgage-backed securities and CMO | 5 | 6 |
Mortgage-backed securities and CMO | 5 | 6 |
| 97,730 | 98,993 |
| 96,884 |  |
| 5 | 6 | $ 9
| 5 | 6 | 9
Debt Securities [Member] |  |  |
Note 3 - Investment Securities (Details) - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity [Line Items] |  |  |
| $ 96,253 | 96,910 | $ 106,688
|  | 98,143 |
|  | 6 |
|  | $ 6 |

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- Definition Fair value of investment in held-to-maturity debt securities with a single maturity date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 + Details
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- Definition Fair value of held-to-maturity debt securities maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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- Definition Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the next fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 + Details
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- Definition Amount of held-to-maturity debt securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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- Definition Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, over several maturity groupings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d),(f) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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- Definition Fair value of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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