| Document and Entity Information | Oct. 07, 2019 |
| Document And Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 7, 2019 |
| Entity Registrant Name | KOPIN CORP |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-19882 |
| Entity Tax Identification Number | 04-2833935 |
| Entity Address, Address Line One | 125 North Drive, |
| Entity Address, City or Town | Westborough, |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 01581 |
| City Area Code | 508 |
| Local Phone Number | 870-5959 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 |
| Trading Symbol | KOPN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0000771266 |
