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Note 12 - Fair Value Measurements - Carrying Values and Estimated Values of Financial Instruments (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fair value, available for sale securities | $ 159,742 | $ 140,225 | [1]
Securities held to maturity | 13,424 |  |
Restricted securities | 1,631 | 1,875 | [1]
Bank owned life insurance | 18,029 | 17,916 | [1]
Reported Value Measurement [Member] |  |  |
Cash and short-term investments | 176,262 | 127,297 |
Fair value, available for sale securities | 159,742 | 140,225 |
Securities held to maturity | 13,424 | 14,234 |
Restricted securities | 1,631 | 1,875 |
Loans, net | 630,716 | 622,429 |
Bank owned life insurance | 18,029 | 17,916 |
Accrued interest receivable | 2,609 | 2,717 |
Derivatives - cash flow hedges | 1,365 | 431 |
Deposits | 916,057 | 842,461 |
Subordinated debt | 9,992 | 9,991 |
Junior subordinated debt | 9,279 | 9,279 |
Accrued interest payable | 177 | 134 |
Loans held for sale |  | 245 |
Estimate of Fair Value Measurement [Member] |  |  |
Cash and short-term investments | 176,262 | 127,297 |
Fair value, available for sale securities | 159,742 | 140,225 |
Securities held to maturity | 13,843 | 14,743 |
Restricted securities | 1,631 | 1,875 |
Loans, net | 639,217 | 633,638 |
Bank owned life insurance | 18,029 | 17,916 |
Accrued interest receivable | 2,609 | 2,717 |
Derivatives - cash flow hedges | 1,365 | 431 |
Deposits | 916,688 | 843,418 |
Subordinated debt | 10,955 | 10,304 |
Junior subordinated debt | 10,662 | 10,364 |
Accrued interest payable | 177 | 134 |
Loans held for sale |  | 245 |
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Cash and short-term investments | 176,262 | 127,297 |
Fair value, available for sale securities |  |  |
Securities held to maturity |  |  |
Restricted securities |  |  |
Loans, net |  |  |
Bank owned life insurance |  |  |
Accrued interest receivable |  |  |
Derivatives - cash flow hedges |  |  |
Deposits |  |  |
Subordinated debt |  |  |
Junior subordinated debt |  |  |
Accrued interest payable |  |  |
Loans held for sale |  |  |
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Cash and short-term investments |  |  |
Fair value, available for sale securities | 159,742 | 140,225 |
Securities held to maturity | 12,252 | 13,138 |
Restricted securities | 1,631 | 1,875 |
Loans, net |  |  |
Bank owned life insurance | 18,029 | 17,916 |
Accrued interest receivable | 2,609 | 2,717 |
Derivatives - cash flow hedges | 1,365 | 431 |
Deposits | 818,292 | 742,264 |
Subordinated debt |  |  |
Junior subordinated debt |  |  |
Accrued interest payable | 177 | 134 |
Loans held for sale |  | 245 |
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Cash and short-term investments |  |  |
Fair value, available for sale securities |  |  |
Securities held to maturity | 1,591 | 1,605 |
Restricted securities |  |  |
Loans, net | 639,217 | 633,638 |
Bank owned life insurance |  |  |
Accrued interest receivable |  |  |
Derivatives - cash flow hedges |  |  |
Deposits | 98,396 | 101,154 |
Subordinated debt | 10,955 | 10,304 |
Junior subordinated debt | 10,662 | 10,364 |
Accrued interest payable |  |  |
Loans held for sale |  |  |
[1] | Derived from audited consolidated financial statements.

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