| Cover | Nov. 18, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 18, 2021 |
| Entity File Number | 001-15751 |
| Entity Registrant Name | eMagin Corporation |
| Entity Central Index Key | 0001046995 |
| Entity Tax Identification Number | 56-1764501 |
| Entity Incorporation, State or Country Code | DE |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $.001 Par Value Per Share |
| Trading Symbol | EMAN |
| Security Exchange Name | NYSEAMER |
| Entity Emerging Growth Company | false |
