Note 10 - Subordinated Debentures (Details Textual)		1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 01, 2018	Jan. 31, 2020 USD ($) shares	Oct. 31, 2018 USD ($) shares	Sep. 30, 2023 USD ($) $ / shares	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Debt Instrument, Face Amount				$ 175,000,000		$ 175,000,000		$ 175,000,000
Interest Expense, Debt				2,050,000	$ 2,050,000	6,149,000	$ 6,149,000
Subordinated Debt [Member]
Interest Expense, Debt				330,000	178,000	921,000	407,000
Debt Amortization Expense				55,000	$ 55,000	164,000	$ 164,000
TFC Statutory Trust [Member] | Other Assets [Member]
Common Stock Held in Trust				155,000		155,000
TFC Statutory Trust [Member] | Fair Value, Inputs, Level 1 [Member]
Subordinated Debt Obligations, Fair Value Disclosure				3,300,000		3,300,000
TFC Statutory Trust [Member] | Subordinated Debt [Member]
Debt Instrument, Face Amount				5,000,000		5,000,000
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Ending Balance				$ 1,900,000		$ 1,900,000
Debt Instrument Redemption, Percentage of Principal Amount Outstanding						100.00%
Debt Instrument, Maximum Number Of Period For Deferred Interest Payments (Year)						5 years
Debt Instrument, Interest Rate, Effective Percentage				7.32%		7.32%		6.42%
TFC Statutory Trust [Member] | Subordinated Debt [Member] | Tenor Spread Adjustment [Member]
Debt Instrument, Basis Spread on Variable Rate						0.26%
TFC Statutory Trust [Member] | Subordinated Debt [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate						1.65%
TFC Statutory Trust [Member] | Subordinated Debt [Member] | London Interbank Offered Rate [Member]
Debt Instrument, Basis Spread on Variable Rate								1.65%
TFC Statutory Trust [Member] | Private Placement [Member]
Number of Trust Preferred Securities (in shares) | shares						5,000
Trust Preferred Securities Lquidation Amount Per Preferred Security (in dollars per share) | $ / shares				$ 1,000		$ 1,000
First American International Statutory Trust I 1[Member]
Common Unit, Issued (in shares) | shares			7,000
Floating Rate Maturity Period (Year)			30 years
Common Unit Liquidation Preference Value			$ 7,000,000
First American International Statutory Trust I 1[Member] | Other Assets [Member]
Debt Instrument, Face Amount			7,200,000
Common Stock Held in Trust			217,000
First American International Statutory Trust I 1[Member] | Subordinated Debt [Member]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Ending Balance			$ 1,200,000
Debt Instrument, Maximum Number Of Period For Deferred Interest Payments (Year)			5 years
Debt Instrument, Interest Rate, Effective Percentage				7.92%		7.92%		7.02%
First American International Statutory Trust I 1[Member] | Subordinated Debt [Member] | Tenor Spread Adjustment [Member]
Debt Instrument, Basis Spread on Variable Rate	0.26%
First American International Statutory Trust I 1[Member] | Subordinated Debt [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate			2.25%
PGB Holdings Inc And Banking Subsidiary Pacific Global Bank [Member]
Common Unit, Issued (in shares) | shares		5,000
Common Unit Liquidation Preference Value		$ 5,000,000
Number of Common Securities		155
Common Securities Liquidation Preference Value		$ 155,000
PGB Holdings Inc And Banking Subsidiary Pacific Global Bank [Member] | Subordinated Debt [Member]
Debt Instrument, Face Amount		5,200,000
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Ending Balance		$ 763,000
Debt Instrument, Maximum Number Of Period For Deferred Interest Payments (Year)		5 years
Debt Instrument, Interest Rate, Effective Percentage				7.77%		7.77%		6.87%
PGB Holdings Inc And Banking Subsidiary Pacific Global Bank [Member] | Subordinated Debt [Member] | Tenor Spread Adjustment [Member]
Debt Instrument, Basis Spread on Variable Rate		0.26%
PGB Holdings Inc And Banking Subsidiary Pacific Global Bank [Member] | Subordinated Debt [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate		2.10%