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Note 4 - Available-for-sale Securities - Investment Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Amortized cost, due within 5 years | $ 8,325 |
Amortized cost, due after 5 years through 10 years | 19,797 | 16,700
Amortized cost, due after 10 years | 13,405 | 9,130
Available-for-sale securities, amortized cost | 41,527 | 25,830
Fair value, due within 5 years | 8,314 |
Fair value, due after 5 years through 10 years | 19,051 | 16,583
Fair value, due after 10 years | 12,899 | 8,993
Available-for-sale securities | 40,264 | 25,576
Available-for-sale securities | 40,264 | 25,576
Corporate Debt Securities [Member] |  |
Amortized cost, due within 5 years |  |
Amortized cost, due after 5 years through 10 years | 9,000 | 9,000
Amortized cost, due after 10 years | 5,000 | 5,000
Available-for-sale securities, amortized cost | 14,000 | 14,000
Fair value, due within 5 years |  |
Fair value, due after 5 years through 10 years | 8,397 | 8,928
Fair value, due after 10 years | 4,610 | 4,876
Available-for-sale securities | 13,007 | 13,804
Available-for-sale securities | 13,007 | 13,804
Subordinated Notes [Member] |  |
Amortized cost, due within 5 years |  |
Amortized cost, due after 5 years through 10 years | 4,500 | 4,500
Amortized cost, due after 10 years |  |
Available-for-sale securities, amortized cost | 4,500 | 4,500
Fair value, due within 5 years |  |
Fair value, due after 5 years through 10 years | 4,525 | 4,548
Fair value, due after 10 years |  |
Available-for-sale securities | 4,525 | 4,548
Available-for-sale securities | 4,525 | 4,548
US Treasury Securities [Member] |  |
Amortized cost, due within 5 years | 1,497 |
Amortized cost, due after 5 years through 10 years |  |
Amortized cost, due after 10 years |  |
Available-for-sale securities, amortized cost | 1,497 |
Fair value, due within 5 years | 1,497 |
Fair value, due after 5 years through 10 years |  |
Fair value, due after 10 years |  |
Available-for-sale securities | 1,497 |
Available-for-sale securities | 1,497 |
Available-for-sale Securities with Single Maturity Dates [Member] |  |
Amortized cost, due within 5 years | 1,497 |
Amortized cost, due after 5 years through 10 years | 13,500 | 13,500
Amortized cost, due after 10 years | 5,000 | 5,000
Available-for-sale securities, amortized cost | 19,997 | 18,500
Fair value, due within 5 years | 1,497 |
Fair value, due after 5 years through 10 years | 12,922 | 13,476
Fair value, due after 10 years | 4,610 | 4,876
Available-for-sale securities | 19,029 | 18,352
Available-for-sale securities | 19,029 | 18,352
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Amortized cost, due within 5 years | 6,828 |
Amortized cost, due after 5 years through 10 years | 6,297 | 3,200
Amortized cost, due after 10 years | 8,405 | 4,130
Available-for-sale securities, amortized cost | 21,530 | 7,330
Fair value, due within 5 years | 6,817 |
Fair value, due after 5 years through 10 years | 6,129 | 3,107
Fair value, due after 10 years | 8,289 | 4,117
Available-for-sale securities | 21,235 | 7,224
Available-for-sale securities | $ 21,235 | $ 7,224

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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- 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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