Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Aug. 20, 2025	Jun. 30, 2024
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2024
Document Fiscal Period Focus	FY
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
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 3.3
Entity Common Stock, Shares Outstanding		10,071,293
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Auditor Firm ID	7116
Auditor Name	Beckles & Co., Inc
Auditor Location	West Palm Beach, Florida