Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Stock-Based Compensation - Stock-Based Compensation (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Payment Arrangement, Noncash Expense $ 50,482 $ 42,671 $ 132,312 $ 120,604
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   3,838,750  
Number of shares remaining available for future issuance 602,350   602,350