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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2017
Mar. 15, 2018
Jun. 30, 2017
Document Information [Line Items]      
Entity Registrant Name CVD EQUIPMENT CORP    
Entity Central Index Key 0000766792    
Trading Symbol cvv    
Current Fiscal Year End Date --12-31    
Entity Filer Category Smaller Reporting Company    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Common Stock, Shares Outstanding (in shares)   6,458,714  
Entity Public Float     $ 58,029,593
Document Type 10-K    
Document Period End Date Dec. 31, 2017    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Amendment Flag false