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Note 2 - Available-for-sale Securities - Investment Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Available-for-sale securities, amortized cost | $ 21,236 | $ 24,624
Available-for-sale securities, gross unrealized gains | 114 | 35
Available-for-sale securities, gross unrealized losses | (149) | (231)
Available-for-sale securities, at fair value | 21,201 | 24,428
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities, amortized cost | 4,736 | 10,624
Available-for-sale securities, gross unrealized gains | 6 | 9
Available-for-sale securities, gross unrealized losses | (86) | (192)
Available-for-sale securities, at fair value | 4,656 | 10,441
Corporate Debt Securities [Member] |  |
Available-for-sale securities, amortized cost | 9,000 | 9,000
Available-for-sale securities, gross unrealized gains |  |
Available-for-sale securities, gross unrealized losses | (63) | (39)
Available-for-sale securities, at fair value | 8,937 | 8,961
Subordinated Notes [Member] |  |
Available-for-sale securities, amortized cost | 7,500 | 5,000
Available-for-sale securities, gross unrealized gains | 108 | 26
Available-for-sale securities, gross unrealized losses |  |
Available-for-sale securities, at fair value | $ 7,608 | $ 5,026

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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=75030427&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=82897076&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=82896770&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=82897076&loc=d3e27161-111563 + Details
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- Definition Amount before tax of unrealized loss 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 (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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