Note 13 - Fair Value and Interest Rate Risk - Financial Assets and Liabilities (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Fair value, total	$ 85,917,000	$ 94,341,000
SBA servicing assets	773,000	617,000
Reported Value Measurement [Member]
Financial assets, total	998,801,000	892,719,000
Financial liabilities, total	990,939,000	870,364,000
Estimate of Fair Value Measurement [Member]
Financial assets, total	977,709,000	891,279,000
Financial liabilities, total	982,459,000	873,377,000
Fair Value, Inputs, Level 1 [Member] \| Reported Value Measurement [Member] \| Brokered Deposits [Member]
Deposits	34,426,000	17,016,000
Fair Value, Inputs, Level 1 [Member] \| Reported Value Measurement [Member] \| Cash and Due from Banks [Member]
Cash and cash equivalents	4,319,000	3,264,000
Fair Value, Inputs, Level 1 [Member] \| Reported Value Measurement [Member] \| Interest-Bearing Deposits [Member]
Cash and cash equivalents	26,865,000	43,781,000
Fair Value, Inputs, Level 1 [Member] \| Estimate of Fair Value Measurement [Member] \| Brokered Deposits [Member]
Deposits	33,275,000	17,003,000
Fair Value, Inputs, Level 1 [Member] \| Estimate of Fair Value Measurement [Member] \| Cash and Due from Banks [Member]
Cash and cash equivalents	4,319,000	3,264,000
Fair Value, Inputs, Level 1 [Member] \| Estimate of Fair Value Measurement [Member] \| Interest-Bearing Deposits [Member]
Cash and cash equivalents	26,865,000	43,781,000
Fair Value, Inputs, Level 2 [Member] \| Reported Value Measurement [Member]
Fair value, total	76,535,000	81,161,000
Other investments	4,450,000	4,450,000
Federal Reserve Bank stock	2,671,000	2,843,000
Federal Home Loan Bank stock	5,474,000	4,184,000
Loans held for sale	8,748,000	3,129,000
Accrued interest receivable	6,504,000	5,822,000
FHLB borrowings	125,000,000	90,000,000
Senior notes	12,000,000	12,000,000
Subordinated debt	9,832,000	9,811,000
Junior subordinated debt owed to unconsolidated trust	8,125,000	8,119,000
Accrued interest payable	721,000	343,000
Interest rate swap liability	229,000	738,000
Fair Value, Inputs, Level 2 [Member] \| Reported Value Measurement [Member] \| Demand Deposits [Member]
Deposits	247,704,000	226,713,000
Fair Value, Inputs, Level 2 [Member] \| Reported Value Measurement [Member] \| Savings Deposits [Member]
Deposits	87,443,000	109,744,000
Fair Value, Inputs, Level 2 [Member] \| Reported Value Measurement [Member] \| Money Market Deposits [Member]
Deposits	180,772,000	164,518,000
Fair Value, Inputs, Level 2 [Member] \| Reported Value Measurement [Member] \| Negotiable Order of Withdrawal (NOW) Accounts [Member]
Deposits	38,435,000	34,741,000
Fair Value, Inputs, Level 2 [Member] \| Reported Value Measurement [Member] \| Time Deposits [Member]
Deposits	245,615,000	195,830,000
Fair Value, Inputs, Level 2 [Member] \| Reported Value Measurement [Member] \| Interest Rate Swap [Member]
Interest rate swap	229,000	738,000
Fair Value, Inputs, Level 2 [Member] \| Estimate of Fair Value Measurement [Member]
Fair value, total	76,535,000	81,161,000
Other investments	4,450,000	4,450,000
Federal Reserve Bank stock	2,671,000	2,843,000
Federal Home Loan Bank stock	5,474,000	4,184,000
Loans held for sale	9,415,000	3,506,000
Accrued interest receivable	6,504,000	5,822,000
FHLB borrowings	123,885,000	93,643,000
Senior notes	11,936,000	12,045,000
Subordinated debt	9,630,000	9,947,000
Junior subordinated debt owed to unconsolidated trust	8,125,000	8,119,000
Accrued interest payable	721,000	343,000
Interest rate swap liability	229,000	738,000
Fair Value, Inputs, Level 2 [Member] \| Estimate of Fair Value Measurement [Member] \| Demand Deposits [Member]
Deposits	247,704,000	226,713,000
Fair Value, Inputs, Level 2 [Member] \| Estimate of Fair Value Measurement [Member] \| Savings Deposits [Member]
Deposits	87,443,000	109,744,000
Fair Value, Inputs, Level 2 [Member] \| Estimate of Fair Value Measurement [Member] \| Money Market Deposits [Member]
Deposits	180,772,000	164,518,000
Fair Value, Inputs, Level 2 [Member] \| Estimate of Fair Value Measurement [Member] \| Negotiable Order of Withdrawal (NOW) Accounts [Member]
Deposits	38,435,000	34,741,000
Fair Value, Inputs, Level 2 [Member] \| Estimate of Fair Value Measurement [Member] \| Time Deposits [Member]
Deposits	239,716,000	195,048,000
Fair Value, Inputs, Level 2 [Member] \| Estimate of Fair Value Measurement [Member] \| Interest Rate Swap [Member]
Interest rate swap	229,000	738,000
Fair Value, Inputs, Level 3 [Member] \| Reported Value Measurement [Member]
Fair value, total	9,382,000	13,180,000
Loans receivable, net	852,918,000	729,583,000
SBA servicing assets	706,000	584,000
Note payable	637,000	791,000
Fair Value, Inputs, Level 3 [Member] \| Estimate of Fair Value Measurement [Member]
Fair value, total	9,382,000	13,180,000
Loans receivable, net	831,092,000	727,733,000
SBA servicing assets	773,000	617,000
Note payable	$ 588,000	$ 775,000

Fair value portion of the Federal Reserve Bank Stock.

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Fair value portion of interest receivable.

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Fair value of junior subordinated debt owned to unconsolidated trust.

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Fair value portion of investments classified as other.

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Fair value portion of senior notes.

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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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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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