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Note 3 - Available-for-sale Securities - Investment Debt Securities by Contractual Maturity (Details) - USD ($) | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Amortized cost, Due within 5 years | $ 10,000 |
Amortized Cost, Due after 5 years through 10 years | 6,132,000 | 18,905,000
Amortized Cost, Due after 10 years | 8,492,000 | 10,720,000
Amortized Cost, Total | 24,624,000 | 29,625,000
Fair value, Due within 5 years | 9,987,000 |
Fair value, Due after 5 years through 10 years | 6,106,000 | 18,827,000
Fair value, Due after 10 years | 8,335,000 | 10,550,000
Available-for-sale securities | 24,428,000 | 29,377,000
Corporate Debt Securities [Member] |  |
Amortized cost, Due within 5 years | 9,000,000 |
Amortized Cost, Due after 5 years through 10 years |  | 9,000,000
Amortized Cost, Due after 10 years |  |
Amortized Cost, Total | 9,000,000 | 9,000,000
Fair value, Due within 5 years | 8,961,000 |
Fair value, Due after 5 years through 10 years |  | 9,010,000
Fair value, Due after 10 years |  |
Available-for-sale securities | 8,961,000 | 9,010,000
Subordinated Notes [Member] |  |
Amortized cost, Due within 5 years | 1,000,000 |
Amortized Cost, Due after 5 years through 10 years | 4,000,000 | 2,000,000
Amortized Cost, Due after 10 years |  |
Amortized Cost, Total | 5,000,000 | 2,000,000
Fair value, Due within 5 years | 1,026,000 |
Fair value, Due after 5 years through 10 years | 4,000,000 | 2,000,000
Fair value, Due after 10 years |  |
Available-for-sale securities | 5,026,000 | 2,000,000
US Government Agencies Debt Securities [Member] |  |
Amortized cost, Due within 5 years |  |
Amortized Cost, Due after 5 years through 10 years |  | 5,000,000
Amortized Cost, Due after 10 years |  |
Amortized Cost, Total |  | 5,000,000
Fair value, Due within 5 years |  |
Fair value, Due after 5 years through 10 years |  | 4,954,000
Fair value, Due after 10 years |  |
Available-for-sale securities |  | 4,954,000
Available-for-sale Securities with Single Maturity Dates [Member] |  |
Amortized cost, Due within 5 years | 10,000 |
Amortized Cost, Due after 5 years through 10 years | 4,000,000 | 16,000,000
Amortized Cost, Due after 10 years |  |
Amortized Cost, Total | 14,000,000 | 16,000,000
Fair value, Due within 5 years | 9,987 |
Fair value, Due after 5 years through 10 years | 4,000,000 | 15,964,000
Fair value, Due after 10 years |  |
Available-for-sale securities | 13,987,000 | 15,964,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Amortized cost, Due within 5 years |  |
Amortized Cost, Due after 5 years through 10 years | 2,132,000 | 2,905,000
Amortized Cost, Due after 10 years | 8,492,000 | 10,720,000
Amortized Cost, Total | 10,624,000 | 13,625,000
Fair value, Due within 5 years |  |
Fair value, Due after 5 years through 10 years | 2,106,000 | 2,863,000
Fair value, Due after 10 years | 8,335,000 | 10,550,000
Available-for-sale securities | $ 10,441,000 | $ 13,413,000

X
- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing in the first 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 No definition available. + Details
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X
- Definition Fair value of available-for-sale debt securities maturing in the first fiscal year through the fifth 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 No definition available. + Details
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- Definition This item represents the cost of debt 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 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 Reference 2: 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 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=65884222&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=73527792&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=66010992&loc=d3e26610-111562 + 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=73527792&loc=d3e27198-111563 + Details
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