Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 31, 2020
Document and Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Transition Report	false
Entity File Number	001-15751
Entity Registrant Name	EMAGIN CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	56-1764501
Entity Address, Address Line One	700 South Drive
Entity Address, Address Line Two	Suite 201
Entity Address, City or Town	Hopewell Junction
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	12533
City Area Code	845
Local Phone Number	838-7900
Title of 12(b) Security	Common Stock, $.001 Par Value Per Share
Trading Symbol	EMAN
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
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 Common Stock, Shares Outstanding		67,499,602
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Entity Central Index Key	0001046995
Document Fiscal Period Focus	Q3