Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information Document and Entity Information

v2.4.0.8
Document and Entity Information Document and Entity Information
6 Months Ended
Jun. 30, 2014
Aug. 13, 2014
Document and Entity Information [Abstract]    
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-Q  
Document Period End Date Jun. 30, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   15,806,306