Note 12 - Employee Benefit Plans (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Employee Benefit Plans [Line Items]
Defined contribution plan, plan name	QNB Bank Retirement Savings Plan
Matching company contribution	3.00%
Safe harbor non-elective contributions	5.00%
Matching contribution, amount	$ 376,000	$ 345,000	$ 340,000
Safe harbor contribution, amount	669,000	$ 606,000	$ 608,000
Nonqualified defined contribution plan contribution amount	$ 108,000
Employee Stock Purchase Plan 2016 [Member]
Employee Benefit Plans [Line Items]
Discount rate on common stock	10.00%
Employee Stock Purchase Plan 2021 [Member]
Employee Benefit Plans [Line Items]
Shares authorized for issuance	30,000
Shares issued	6,630
Expiration date	May 31, 2026