Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.1
Stock-Based Compensation - Stock-Based Compensation (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Payment Arrangement, Noncash Expense $ 95,707 $ 39,085
Stock Options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation cost not yet recognized, amount $ 676,437  
Compensation cost not yet recognized, period for recognition 1 year 8 months 26 days  
Tecogen    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair value of options $ 304,550  
Weighted average grant date fair value (in dollars per share) $ 0.42  
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 42,643