Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Nov. 01, 2022
Document And Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2022
Entity File Number	001-38131
Entity Registrant Name	Esquire Financial Holdings, Inc.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	27-5107901
Entity Address, Address Line One	100 Jericho Quadrangle, Suite 100,
Entity Address, City or Town	Jericho
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11753
City Area Code	516
Local Phone Number	535-2002
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	ESQ
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		8,149,321
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2022
Amendment Flag	false
Entity Central Index Key	0001531031