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Note 3 - Available-for-sale Securities (Details) - Investment Securities - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
2015 |  |
Available-for-sale securities, amortized cost | $ 29,625 | $ 34,135
Available-for-sale securities, gross unrealized losses | (319) | (453)
Available-for-sale securities, gross unrealized gains | 71 | 0
Available-for-sale securities | 29,377 | 33,682
US Government Agencies Debt Securities [Member] |  |
2015 |  |
Available-for-sale securities, amortized cost | 5,000 | 7,500
Available-for-sale securities, gross unrealized losses | (46) | (91)
Available-for-sale securities, gross unrealized gains | 0 | 0
Available-for-sale securities | 4,954 | 7,409
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
2015 |  |
Available-for-sale securities, amortized cost | 13,625 | 17,635
Available-for-sale securities, gross unrealized losses | (212) | (298)
Available-for-sale securities, gross unrealized gains | 0 | 0
Available-for-sale securities | 13,413 | 17,337
Corporate Debt Securities [Member] |  |
2015 |  |
Available-for-sale securities, amortized cost | 9,000 | 9,000
Available-for-sale securities, gross unrealized losses | (61) | (64)
Available-for-sale securities, gross unrealized gains | 71 | 0
Available-for-sale securities | 9,010 | $ 8,936
Subordinated Notes [Member] |  |
2015 |  |
Available-for-sale securities, amortized cost | 2,000 |
Available-for-sale securities, gross unrealized losses | 0 |
Available-for-sale securities, gross unrealized gains | 0 |
Available-for-sale securities | $ 2,000 |

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562 + Details
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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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