| Document And Entity Information | Aug. 16, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | CVD EQUIPMENT CORPORATION |
| Document, Type | 8-K |
| Document, Period End Date | Aug. 16, 2021 |
| Entity, Incorporation, State or Country Code | NY |
| Entity, File Number | 1-16525 |
| Entity, Tax Identification Number | 11-2621692 |
| Entity, Address, Address Line One | 355 South Technology Drive |
| Entity, Address, City or Town | Central Islip |
| Entity, Address, State or Province | NY |
| Entity, Address, Postal Zip Code | 11722 |
| City Area Code | 631 |
| Local Phone Number | 981-7081 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | CVV |
| Security Exchange Name | NASDAQ |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0000766792 |
