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Note 18 - Fair Value and Interest Rate Risk - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Available-for-sale securities | $ 24,428 | $ 29,377
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities | 10,441 | 13,413
Corporate Debt Securities [Member] |  |
Available-for-sale securities | 8,961 | 9,010
US Government Agencies Debt Securities [Member] |  |
Available-for-sale securities |  | 4,954
Subordinated Notes [Member] |  |
Available-for-sale securities | 5,026 | 2,000
Reported Value Measurement [Member] |  |
Financial assets, total | 708,593 | 609,009
Financial liabilities, total | 688,918 | 587,223
Financial assets, net | 19,675 | 21,786
Estimate of Fair Value Measurement [Member] |  |
Financial assets, total | 708,368 | 608,042
Financial liabilities, total | 687,463 | 586,383
Financial assets, net | 20,905 | 21,659
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] | Brokered Deposits [Member] |  |
Deposits | 63,932 | 48,154
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] | Cash and Due from Banks [Member] |  |
Cash and cash equivalents | 2,596 | 2,588
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] | Interest-bearing Deposits [Member] |  |
Cash and cash equivalents | 89,693 | 82,812
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Brokered Deposits [Member] |  |
Deposits | 63,897 | 48,062
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Cash and Due from Banks [Member] |  |
Cash and cash equivalents | 2,596 | 2,588
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Interest-bearing Deposits [Member] |  |
Cash and cash equivalents | 89,693 | 82,812
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] |  |
Other investments | 4,450 | 4,450
Federal Reserve Bank stock | 2,109 | 2,075
Federal Home Loan Bank stock | 5,609 | 6,570
Accrued interest receivable | 2,726 | 2,010
FHLB and correspondent bank borrowings | 138,000 | 132,000
Senior notes | 11,628 |
Subordinated debentures | 8,079 | 8,072
Accrued interest payable | 118 | 532
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Demand Deposits [Member] |  |
Deposits | 76,772 | 85,797
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Savings Deposits [Member] |  |
Deposits | 131,429 | 106,291
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Money Market Deposits [Member] |  |
Deposits | 15,593 | 19,508
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Negotiable Order of Withdrawal (NOW) Accounts [Member] |  |
Deposits | 29,912 | 27,951
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Time Deposits [Member] |  |
Deposits | 211,686 | 156,964
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities | 10,441 | 13,413
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Corporate Debt Securities [Member] |  |
Available-for-sale securities | 8,961 | 9,010
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | US Government Agencies Debt Securities [Member] |  |
Available-for-sale securities |  | 4,954
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Subordinated Notes [Member] |  |
Available-for-sale securities | 3,026 | 2,000
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Other investments | 4,450 | 4,450
Federal Reserve Bank stock | 2,109 | 2,075
Federal Home Loan Bank stock | 5,609 | 6,570
Accrued interest receivable | 2,726 | 2,010
FHLB and correspondent bank borrowings | 138,149 | 131,903
Senior notes | 11,628 |
Subordinated debentures | 8,079 | 8,072
Accrued interest payable | 118 | 532
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Demand Deposits [Member] |  |
Deposits | 76,772 | 85,797
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Savings Deposits [Member] |  |
Deposits | 131,429 | 106,291
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Money Market Deposits [Member] |  |
Deposits | 15,593 | 19,508
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Negotiable Order of Withdrawal (NOW) Accounts [Member] |  |
Deposits | 29,912 | 27,951
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Time Deposits [Member] |  |
Deposits | 210,321 | 156,363
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities | 10,441 | 13,413
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Corporate Debt Securities [Member] |  |
Available-for-sale securities | 8,961 | 9,010
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | US Government Agencies Debt Securities [Member] |  |
Available-for-sale securities |  | 4,954
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Subordinated Notes [Member] |  |
Available-for-sale securities | 3,026 | 2,000
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] |  |
Loans receivable, net | 576,982 | 479,127
Note payable | 1,769 | 1,954
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] | Subordinated Notes [Member] |  |
Available-for-sale securities | 2,000 |
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |
Loans receivable, net | 576,757 | 478,160
Note payable | 1,565 | 1,904
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Subordinated Notes [Member] |  |
Available-for-sale securities | $ 2,000 |

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