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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	Mar. 31, 2016	Dec. 31, 2015
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	$ 28,735	$ 29,377
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	28,735	29,377
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	4,989	4,954
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	4,989	4,954
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	12,849	13,413
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	12,849	13,413
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	8,897	9,010
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	8,897	9,010
Subordinated Notes [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	2,000	2,000
Subordinated Notes [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	2,000	2,000
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	28,735	29,377
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	4,989	4,954
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	12,849	13,413
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	8,897	9,010
Fair Value, Inputs, Level 2 [Member] | Subordinated Notes [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	$ 2,000	$ 2,000

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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

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