Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.5.0.2
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2016
Oct. 21, 2016
Document And Entity Information    
Entity Registrant Name MECHANICAL TECHNOLOGY INC  
Entity Central Index Key 0000064463  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Document Type 10-Q  
Document Period End Date Sep. 30, 2016  
Entity a Well-known Seasoned Issuer No  
Entity a Voluntary Filer No  
Entity's Reporting Status Current Yes  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   8,998,482
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2016