Cover - shares	9 Months Ended
	Sep. 30, 2024	Nov. 14, 2024
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2024
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--12-31
Entity File Number	001-37367
Entity Registrant Name	OPGEN, INC.
Entity Central Index Key	0001293818
Entity Tax Identification Number	06-1614015
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	23219 Stringtown Road
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	Clarksburg
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	20871
City Area Code	240
Local Phone Number	813-1260
Title of 12(b) Security	Common Stock
Trading Symbol	OPGN
Security Exchange Name	NASDAQ
Entity Current Reporting Status	No
Entity Interactive Data Current	No
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,068,111