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Note 2 - Investment Securities - Amortized Cost and Aggregate Fair Value of Available For Sale and Held to Maturity Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Securities available for sale, due within one year, amortized cost | $ 650 |
Securities available for sale, due within one year, fair value | 653 |
Securities available for sale, due after one year but within five years, amortized cost | 2,787 |
Securities available for sale, due after one year but within five years, fair value | 2,862 |
Securities available for sale, due after five years but within ten years, amortized cost | 107,291 |
Securities available for sale, due after five years but within ten years, fair value | 107,929 |
Securities available for sale, due after ten years, amortized cost | 19,549 |
Securities available for sale, due after ten years, fair value | 19,003 |
Securities available for sale, Amortized Cost | 158,904 | $ 166,450
Securities available for sale | 158,685 | 165,579
Securities held to maturity, due within one year, amortized cost | 21,844 |
Securities held to maturity, due within one year, fair value | 21,844 |
Securities held to maturity, due after one year but within five years, amortized cost | 25,248 |
Securities held to maturity, due after one year but within five years, fair value | 25,352 |
Securities held to maturity, due after five years but within ten years, amortized cost |  |
Securities held to maturity, due after five years but within ten years, fair value |  |
Securities held to maturity, due after ten years, amortized cost |  |
Securities held to maturity, due after ten years, fair value |  |
Securities held to maturity | 47,092 | 47,133
Securities held to maturity, fair value | 47,196 | 47,266
Debt Securities [Member] |  |
Securities available for sale, Amortized Cost | 130,277 |
Securities available for sale | 130,447 |
Collateralized Mortgage Backed Securities [Member] |  |
Securities available for sale, Amortized Cost | 28,572 |
Securities available for sale | 28,165 |
Equity Securities [Member] |  |
Securities available for sale, Amortized Cost | 55 | 55
Securities available for sale | $ 73 | $ 73

X
- 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 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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- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. 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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 + Details
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- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. 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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 + Details
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