Annual report pursuant to Section 13 and 15(d)

Document and Entity Information Document and Entity Information

v3.6.0.2
Document and Entity Information Document and Entity Information - shares
12 Months Ended
Dec. 31, 2016
Mar. 21, 2017
Entity Information [Line Items]    
Entity Registrant Name Tecogen Inc.  
Entity Central Index Key 0001537435  
Current Fiscal Year End Date --12-31  
Entity Filer Category Smaller Reporting Company  
Document Type 10-K  
Document Period End Date Dec. 31, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus FY  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   20,043,052
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes