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Note 4 - Debt and Equity Securities (Details Textual) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2016 USD ($)
Proceeds from Sale of Available-for-sale Securities | $ 0 | $ 0 |
Trading Securities | 0 |  | $ 0
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities | $ 0 |  | 0
Collateralized By Commercial Real Estate [Member] | Collateralized Mortgage Obligations [Member] |  |  |
Private Issue Collateralized Mortgage Obligations, Number | 1 |  |
Mortgage Backed Securities Available for Sale Fair Value | $ 200 |  | 200
Mortgage Backed Securities Available for Sale Amortized Cost | $ 200 |  | $ 200

X
- Definition The amount of amortized cost on available for sale mortgage backed securities. + References No definition available. + Details
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X
- Definition The amount of fair value of available for sale mortgage backed securities. + References No definition available. + Details
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- Definition The number of privately issued collateralized mortgage obligations. + References No definition available. + Details
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- Definition The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=82896770&loc=SL6284422-111562 + Details
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- Definition Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 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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