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Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	$ 30,719	$ 33,682
Fair Value, Measurements, Recurring [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	30,719	33,682
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	14,202	17,337
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	14,202	17,337
US Government Agencies Debt Securities [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	7,501	7,409
US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	7,501	7,409
Corporate Debt Securities [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	9,016	8,936
Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	9,016	8,936
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	30,719	33,682
Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	14,202	17,337
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	7,501	7,409
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Note 12 - Fair Value and Interest Rate Risk (Details) - Financial Assets Measured at Fair Value on a Recurring Basis [Line Items]
Available-for-sale securities	$ 9,016	$ 8,936

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 25



-Paragraph 1



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-Name Accounting Standards Codification



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-Name Accounting Standards Codification



-Topic 320



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-Section 45



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-URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562

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