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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Payment Arrangement, Noncash Expense $ 39,494 $ 39,898 $ 81,730 $ 77,933
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 1,993,458   1,993,458