Quarterly report pursuant to Section 13 or 15(d)

Stock-based compensation - Stock-Based Compensation (Details)

v3.7.0.1
Stock-based compensation - Stock-Based Compensation (Details) - USD ($)
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation $ 97,684 $ 88,177
Tecogen | Amended Plan | Stock Options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares of common stock reserved for future issuance 3,838,750  
Number of shares remaining available for future issuance 2,190,174