Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Stock Option Activity (Details)

v3.23.1
Stock-Based Compensation - Stock Option Activity (Details) - Tecogen - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2020
Stock Options Outstanding [Roll Forward]      
Beginning (shares) 3,204,297    
Granted (shares) 0    
Exercised (shares) 0    
Canceled and forfeited (shares) (4,500)    
Ending (shares) 3,199,797 3,204,297  
Exercisable (shares) 1,768,222    
Vested and expected to vest (shares) 2,985,061    
Exercise Price Per Share [Abstract]      
Exercise Price Per Share, Outstanding, Minimum (per share) $ 0.71 $ 0.71  
Exercise Price Per Share, Outstanding, Maximum (dollars per share) 10.33 10.33  
Weighted Average Exercise Price [Roll Forward]      
Beginning (usd per share) 1.61    
Granted (usd per share)    
Canceled and forfeited (usd per share) 1.11    
Ending (usd per share) 1.61 $ 1.61  
Exercisable (usd per share) 2.08    
Vested and expected to vest (usd per share) $ 1.65    
Weighted Average Remaining Life 7 years 18 days   7 years 3 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Outstanding, Aggregate Intrinsic Value $ 741,404 $ 882,074  
Exercisable, Aggregate Intrinsic Value 375,744    
Vested and expected to vest, Aggregate Intrinsic Value $ 686,555    
Minimum      
Exercise Price Per Share [Abstract]      
Exercise price per share, Granted (dollars per share) $ 1.10    
Maximum      
Exercise Price Per Share [Abstract]      
Exercise price per share, Granted (dollars per share) $ 1.13