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Note 12 - Fair Value Measurements - Carrying Values and Estimated Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair value, available for sale securities	$ 266,600	$ 140,225	[1]
Securities held to maturity	10,046
Restricted securities	1,813	1,875	[1]
Bank owned life insurance	24,141	17,916	[1]
Reported Value Measurement [Member]
Cash and short-term investments	195,230	127,297
Fair value, available for sale securities	266,600	140,225
Securities held to maturity	10,046	14,234
Restricted securities	1,813	1,875
Loans, net	816,977	622,429
Bank owned life insurance	24,141	17,916
Accrued interest receivable	3,823	2,717
Derivatives - cash flow hedges	990	431
Deposits	1,212,570	842,461
Subordinated debt	9,993	9,991
Junior subordinated debt	9,279	9,279
Accrued interest payable	232	134
Loans held for sale		245
Estimate of Fair Value Measurement [Member]
Cash and short-term investments	195,230	127,297
Fair value, available for sale securities	266,600	140,225
Securities held to maturity	10,262	14,743
Restricted securities	1,813	1,875
Loans, net	823,227	633,638
Bank owned life insurance	24,141	17,916
Accrued interest receivable	3,823	2,717
Derivatives - cash flow hedges	990	431
Deposits	1,212,831	843,418
Subordinated debt	10,935	10,304
Junior subordinated debt	10,824	10,364
Accrued interest payable	232	134
Loans held for sale		245
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and short-term investments	195,230	127,297
Fair value, available for sale securities	0	0
Securities held to maturity	0	0
Restricted securities	0	0
Loans, net	0	0
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Derivatives - cash flow hedges	0	0
Deposits	0	0
Subordinated debt	0	0
Junior subordinated debt	0	0
Accrued interest payable	0	0
Loans held for sale		0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and short-term investments	0	0
Fair value, available for sale securities	266,600	140,225
Securities held to maturity	10,262	13,138
Restricted securities	1,813	1,875
Loans, net	0	0
Bank owned life insurance	24,141	17,916
Accrued interest receivable	3,823	2,717
Derivatives - cash flow hedges	990	431
Deposits	1,064,150	742,264
Subordinated debt	0	0
Junior subordinated debt	0	0
Accrued interest payable	232	134
Loans held for sale		245
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Cash and short-term investments	0	0
Fair value, available for sale securities	0	0
Securities held to maturity	0	1,605
Restricted securities	0	0
Loans, net	823,227	633,638
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Derivatives - cash flow hedges	0	0
Deposits	148,681	101,154
Subordinated debt	10,935	10,304
Junior subordinated debt	10,824	10,364
Accrued interest payable	$ 0	0
Loans held for sale		$ 0
[1] Derived from audited consolidated financial statements.

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- Definition

The fair value portion of accrued interest payable.

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Fair value of junior subordinated debt which has a lower priority of repayment than subordinated debt in the event the company falls into liquidation or bankruptcy.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

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