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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
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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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- 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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