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Note 11 - Fair Value and Interest Rate Risk - Financial Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Fair value, total | $ 23,982 | $ 25,576
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Fair value, total | 6,229 | 7,224
Corporate Debt Securities [Member] |  |
Fair value, total | 13,201 | 13,804
Subordinated Notes [Member] |  |
Fair value, total | 4,552 | 4,548
Reported Value Measurement [Member] |  |
Financial assets, total | 876,554 | 804,504
Financial liabilities, total | 854,624 | 779,377
Estimate of Fair Value Measurement [Member] |  |
Financial assets, total | 860,523 | 793,970
Financial liabilities, total | 851,964 | 777,850
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] | Brokered Deposits [Member] |  |
Deposits | 177,917 | 138,129
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] | Cash and Due from Banks [Member] |  |
Cash and cash equivalents | 4,589 | 3,582
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] | Interest-bearing Deposits [Member] |  |
Cash and cash equivalents | 81,052 | 45,659
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Brokered Deposits [Member] |  |
Deposits | 177,503 | 137,870
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Cash and Due from Banks [Member] |  |
Cash and cash equivalents | 4,589 | 3,582
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Interest-bearing Deposits [Member] |  |
Cash and cash equivalents | 81,052 | 45,659
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] |  |
Other investments | 4,450 | 4,450
Federal Reserve Bank stock | 2,564 | 2,502
Federal Home Loan Bank stock | 5,807 | 5,889
Accrued interest receivable | 3,306 | 3,496
FHLB and correspondent bank borrowings | 110,000 | 120,000
Senior notes | 11,740 | 11,703
Subordinated debt | 9,576 |
Junior subordinated debt owed to unconsolidated trust | 8,090 | 8,086
Accrued interest payable | 1,422 | 569
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Demand Deposits [Member] |  |
Deposits | 83,808 | 81,197
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Savings Deposits [Member] |  |
Deposits | 111,812 | 135,975
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Money Market Deposits [Member] |  |
Deposits | 38,240 | 16,575
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Negotiable Order of Withdrawal (NOW) Accounts [Member] |  |
Deposits | 26,352 | 25,476
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Time Deposits [Member] |  |
Deposits | 274,183 | 240,087
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Fair value, total | 6,229 | 7,224
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Corporate Debt Securities [Member] |  |
Fair value, total | 13,201 | 13,804
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Subordinated Notes [Member] |  |
Fair value, total | 4,552 | 4,548
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Other investments | 4,450 | 4,450
Federal Reserve Bank stock | 2,564 | 2,502
Federal Home Loan Bank stock | 5,807 | 5,889
Accrued interest receivable | 3,306 | 3,496
FHLB and correspondent bank borrowings | 110,150 | 120,218
Senior notes | 11,108 | 11,249
Subordinated debt | 9,576 |
Junior subordinated debt owed to unconsolidated trust | 8,090 | 8,086
Accrued interest payable | 1,422 | 569
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Demand Deposits [Member] |  |
Deposits | 83,808 | 81,197
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Savings Deposits [Member] |  |
Deposits | 111,812 | 135,975
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Money Market Deposits [Member] |  |
Deposits | 38,240 | 16,575
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Negotiable Order of Withdrawal (NOW) Accounts [Member] |  |
Deposits | 26,352 | 25,476
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Time Deposits [Member] |  |
Deposits | 272,605 | 239,219
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Fair value, total | 6,229 | 7,224
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Corporate Debt Securities [Member] |  |
Fair value, total | 13,201 | 13,804
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Subordinated Notes [Member] |  |
Fair value, total | 4,552 | 4,548
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] |  |
Loans receivable, net | 750,804 | 713,350
Note payable | 1,484 | 1,580
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |
Loans receivable, net | 734,773 | 702,816
Note payable | $ 1,298 | $ 1,416

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