Document And Entity Information - shares	Sep. 30, 2021	Feb. 25, 2022
Document Information [Line Items]
Entity, Registrant Name	CVD EQUIPMENT CORPORATION
Document, Type	10-Q/A
Current Fiscal Year End Date	--12-31
Document, Fiscal Period Focus	Q3
Document, Fiscal Year Focus	2021
Document, Quarterly Report	true
Document, Period End Date	Sep. 30, 2021
Document, Transition Report	false
Entity, File Number	1-16525
Entity, Incorporation, State or Country Code	NY
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
Title of 12(b) Security	Common Stock
Trading Symbol	CVV
Security Exchange Name	NASDAQ
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		6,723,438
Amendment Description	CVD Equipment Corporation (the “Company”) is filing this Amendment No. 1 (this “Form 10-Q/A”) to its Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021 (the “Form 10-Q”), originally filed with the Securities and Exchange Commission on November 15, 2021, solely for the purpose of filing exhibits previously referenced in the Company’s Current Report on Form 8-K filed with the Securities and Exchange Commission on July 29, 2021.   These exhibits include: (i) the Assignment, Assumption and Amendment Agreement dated as of July 26, 2021, amongst the Town of Islip Industrial Development Agency (the “IDA”), the Company, as assignor, and Steel 555 NRP, LLC , as assignee (the “Assignment Agreement”); (ii) the Second Amended and Restated Lease and Project Agreement, dated as of July 1, 2021, delivered on July 26, 2021, between the IDA and FAE Holdings 411519R, LLC (“FAE”) (a wholly owned subsidiary of the Company) (the “Amended Project Agreement”); (iii) the Agency Compliance Agreement, dated as of July 1, 2021, between the Company, the IDA, CVD Materials Corporation (“Materials”) (a wholly-owned subsidiary of the Company), and FAE (the “Compliance Agreement”); (iv) the Amended and Restated Sublease Agreement, dated as of July 26, 2021, between the Company, IDA, Materials, and FAE (the “Amended Sublease”).   Copies of the Assignment Agreement, Amended Project Agreement, Compliance Agreement, and Amended Sublease are attached hereto as Exhibits 10.1, 10.2, 10.3, and 10.4 to this Form 10-Q/A, respectively.    This amendment continues to speak as of the original filing date of the Form 10-Q, and the Company has not updated the disclosure contained herein to reflect events that have occurred since the filing of the Form 10-Q. Accordingly, this amendment should be read in conjunction with the Company’s other filings made with the Securities and Exchange Commission subsequent to the filing of the Form 10-Q.
Amendment Flag	true
Entity, Central Index Key	0000766792