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Note 9 - Fair Value and Interest Rate Risk - Financial Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Financial Assets: |  |
Available-for-sale securities, at fair value | $ 24,981 | $ 24,428
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | 8,422 | 10,441
Corporate Debt Securities [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | 8,954 | 8,961
Subordinated Notes [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | 7,605 | 5,026
Reported Value Measurement [Member] |  |
Financial Assets: |  |
Financial assets, total | 724,883 | 708,593
Financial Liabilities: |  |
Financial liabilities, total | 703,593 | 688,918
Estimate of Fair Value Measurement [Member] |  |
Financial Assets: |  |
Financial assets, total | 723,433 | 708,368
Financial Liabilities: |  |
Financial liabilities, total | 702,868 | 687,463
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] | Brokered Deposits [Member] |  |
Financial Liabilities: |  |
Deposits | 60,259 | 63,932
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] | Cash and Due from Banks [Member] |  |
Financial Assets: |  |
Cash and cash equivalents | 3,210 | 2,596
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] | Interest-bearing Deposits [Member] |  |
Financial Assets: |  |
Cash and cash equivalents | 7,633 | 89,693
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Brokered Deposits [Member] |  |
Financial Liabilities: |  |
Deposits | 60,222 | 63,897
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Cash and Due from Banks [Member] |  |
Financial Assets: |  |
Cash and cash equivalents | 3,210 | 2,596
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Interest-bearing Deposits [Member] |  |
Financial Assets: |  |
Cash and cash equivalents | 7,633 | 89,693
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] |  |
Financial Assets: |  |
Other investments | 4,450 | 4,450
Federal Reserve Bank stock | 2,424 | 2,109
Federal Home Loan Bank stock | 5,833 | 5,609
Accrued interest receivable | 3,208 | 2,726
Financial Liabilities: |  |
FHLB and correspondent bank borrowings | 120,000 | 138,000
Senior notes | 11,666 | 11,628
Subordinated debentures | 8,082 | 8,079
Accrued interest payable | 131 | 118
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Demand Deposits [Member] |  |
Financial Liabilities: |  |
Deposits | 77,778 | 76,772
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Savings Deposits [Member] |  |
Financial Liabilities: |  |
Deposits | 148,408 | 131,429
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Money Market Deposits [Member] |  |
Financial Liabilities: |  |
Deposits | 14,687 | 15,593
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Negotiable Order of Withdrawal (NOW) Accounts [Member] |  |
Financial Liabilities: |  |
Deposits | 27,947 | 29,912
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Time Deposits [Member] |  |
Financial Liabilities: |  |
Deposits | 232,960 | 211,686
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | 8,422 | 10,441
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Corporate Debt Securities [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | 8,954 | 8,961
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Subordinated Notes [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | 5,605 | 3,026
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Financial Assets: |  |
Other investments | 4,450 | 4,450
Federal Reserve Bank stock | 2,424 | 2,109
Federal Home Loan Bank stock | 5,833 | 5,609
Accrued interest receivable | 3,208 | 2,726
Financial Liabilities: |  |
FHLB and correspondent bank borrowings | 120,202 | 138,149
Senior notes | 11,315 | 11,628
Subordinated debentures | 8,082 | 8,079
Accrued interest payable | 131 | 118
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Demand Deposits [Member] |  |
Financial Liabilities: |  |
Deposits | 77,778 | 76,772
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Savings Deposits [Member] |  |
Financial Liabilities: |  |
Deposits | 148,408 | 131,429
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Money Market Deposits [Member] |  |
Financial Liabilities: |  |
Deposits | 14,687 | 15,593
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Negotiable Order of Withdrawal (NOW) Accounts [Member] |  |
Financial Liabilities: |  |
Deposits | 27,947 | 29,912
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Time Deposits [Member] |  |
Financial Liabilities: |  |
Deposits | 232,590 | 210,321
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | 8,422 | 10,441
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Corporate Debt Securities [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | 8,954 | 8,961
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Subordinated Notes [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | 5,605 | 3,026
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] |  |
Financial Assets: |  |
Loans receivable, net | 673,144 | 576,982
Financial Liabilities: |  |
Note payable | 1,675 | 1,769
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] | Subordinated Notes [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | 2,000 | 2,000
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |
Financial Assets: |  |
Loans receivable, net | 671,694 | 576,757
Financial Liabilities: |  |
Note payable | 1,506 | 1,565
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Subordinated Notes [Member] |  |
Financial Assets: |  |
Available-for-sale securities, at fair value | $ 2,000 | $ 2,000

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