Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Stock-Based Compensation (Details)

v3.19.1
Stock-Based Compensation - Stock-Based Compensation (Details) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation $ 38,035 $ 40,416
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 1,963,680