Note 1 - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2024 USD ($) Lease Contract Segment $ / shares shares	Dec. 31, 2023 USD ($) Contract $ / shares	Dec. 31, 2022 USD ($) $ / shares	Sep. 26, 2024
Summary of Significant Accounting Policies [Line Items]
Number of Operating Segments | Segment	1
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	President and Chief Executive Officer [Member]
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	The CODM evaluates the financial performance of the Company's business components using consolidated revenue, expenses, balance sheet growth and financial ratios to budget and prior periods to determine the allocation of resources and to measure performance. The CODM utilizes consolidated net income to benchmark the Company against its competitors and peer group. This information is used by the CODM to achieve strategic initiatives and allocate resources. Significant revenues are provided by loans, investments and deposits. Significant expenses include interest expense, the provision for credit losses and payroll.
Restricted investment in stocks	$ 5,436,000	$ 2,730,000
Conversion factor per share				1.543
Impairment charge of restricted investment	$ 0
Financing receivable, modifications, subsequent default, number of contracts | Contract	0	0
Loan modifications to borrowers experiencing financial difficulty	$ 1,000,000	$ 0
Lease option to extend description	QNB typically enters into lease agreements with an initial term of 5 to 10 years and subsequent additional optional terms in increments of 5 years.
Lease option to terminate description	The lease agreements also contain termination options. None of the leases contain purchase options and none transfer the ownership of the leased asset.
Number of operating lease renewed | Lease	2
Lease agreement subsequent additional optional term in increments	5 years
Lease agreement option to extend on increments	true
Lease option to terminate	true
Impairment on right-of-use asset	$ 0
Other Postretirement Benefit Expense	25,000	56,000	$ 118,000
Allocated Share-based Compensation Expense	87,000	90,000	70,000
Employee service Share-based compensation, tax benefit from nonqualified compensation expense and disqualifying dispositions	$ 4,000	$ 3,000	$ 2,000
Share-based compensation arrangement by share-based payment award, options, grants in period, weighted average grant date fair value | $ / shares	$ 3.08	$ 4.11	$ 5.2
Unrecognized Tax Benefits	$ 0
Interest accrued	0
Penalties expense	$ 0
Tax years subject to examination by tax authorities	2021
Valuation allowance	$ 172,000	$ 4,000
Net loans	1,207,304,000	$ 1,084,681,000
Commercial Portfolio Segment [Member] | Substandard [Member]
Summary of Significant Accounting Policies [Line Items]
Net loans	6,695,000
Unused commitments	$ 3,306,000
Minimum [Member]
Summary of Significant Accounting Policies [Line Items]
Lease agreements initial terms	5 years
Lease agreement subsequent additional optional term in increments	5 years
Maximum [Member]
Summary of Significant Accounting Policies [Line Items]
Lease agreements initial terms	10 years
Lease agreement subsequent additional optional term in increments	10 years
Investment in Federal Home Loan Bank Stock [Member]
Summary of Significant Accounting Policies [Line Items]
Restricted investment in stocks	$ 3,510,000
Investment in Atlantic Community Bankers Bank Stock [Member]
Summary of Significant Accounting Policies [Line Items]
Restricted investment in stocks	12,000
VISA Class B-2 Stock [Member]
Summary of Significant Accounting Policies [Line Items]
Restricted investment in stocks	$ 0
Number of shares owned | shares	3,251
Investment in National Energy Improvement Fund, LLC [Member]
Summary of Significant Accounting Policies [Line Items]
Restricted investment in stocks	$ 914,000
Investment In SHCPFIC Preferred Stock [Member]
Summary of Significant Accounting Policies [Line Items]
Restricted investment in stocks	$ 1,000,000
Number of shares owned | shares	100