Note 18 - Fair Value Measurements and Fair Value of Financial Instruments - Schedule of Major Category of Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Recurring [Member]
Assets measured at fair value	$ 354,403	$ 256,848
Fair Value, Recurring [Member] | Forward Mortgage Loan Sale Contracts [Member]
Assets measured at fair value		18
Liabilitiies measured at fair value	16
Fair Value, Recurring [Member] | Interest Rate Lock Contracts [Member]
Liabilitiies measured at fair value	9
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Assets measured at fair value	7,894	4,495
Fair Value, Recurring [Member] | Small Business Administration Agency Securities [Member]
Assets measured at fair value	7,261	2,411
Fair Value, Recurring [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets measured at fair value	33,437	42,928
Fair Value, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Assets measured at fair value	138,694	111,593
Fair Value, Recurring [Member] | Commercial Paper [Member]
Assets measured at fair value	129,073	49,537
Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Assets measured at fair value	29,806	37,012
Fair Value, Recurring [Member] | Municipal Securities [Member]
Assets measured at fair value	8,213	8,854
Fair Value, Nonrecurring [Member] | Other Real Estate Owned [Member]
Assets measured at fair value	284	577
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Forward Mortgage Loan Sale Contracts [Member]
Assets measured at fair value		0
Liabilitiies measured at fair value	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Interest Rate Lock Contracts [Member]
Liabilitiies measured at fair value	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Small Business Administration Agency Securities [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Commercial Paper [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Municipal Securities [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] | Other Real Estate Owned [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Assets measured at fair value	354,378	256,830
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Forward Mortgage Loan Sale Contracts [Member]
Assets measured at fair value		0
Liabilitiies measured at fair value	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Interest Rate Lock Contracts [Member]
Liabilitiies measured at fair value	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Assets measured at fair value	7,894	4,495
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Small Business Administration Agency Securities [Member]
Assets measured at fair value	7,261	2,411
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets measured at fair value	33,437	42,928
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Assets measured at fair value	138,694	111,593
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Commercial Paper [Member]
Assets measured at fair value	129,073	49,537
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Assets measured at fair value	29,806	37,012
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Municipal Securities [Member]
Assets measured at fair value	8,213	8,854
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] | Other Real Estate Owned [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Assets measured at fair value	25	18
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Forward Mortgage Loan Sale Contracts [Member]
Assets measured at fair value		18
Liabilitiies measured at fair value	16
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Interest Rate Lock Contracts [Member]
Liabilitiies measured at fair value	9
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Small Business Administration Agency Securities [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Commercial Paper [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Municipal Securities [Member]
Assets measured at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Other Real Estate Owned [Member]
Assets measured at fair value	$ 284	$ 577