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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2022
Tecogen  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Stock Option Activity
Stock option activity for the six months ended June 30, 2022 was as follows: 
Common Stock OptionsNumber of
Options		Exercise
Price
Per
Share		Weighted
Average
Exercise
Price		Weighted
Average
Remaining
Life		Aggregate
Intrinsic
Value
December 31, 20212,386,842 
$0.71-$10.33
$1.81 7.56 years$697,935 
Granted
851,650 
$1.10-$1.20
$1.11 
Exercised
— 
Canceled and forfeited
(28,400)
$1.10-$4.50
$1.53 
Outstanding, June 30, 20223,210,092 
 $0.71-$10.33
$1.63 7.73 years$617,001 
Exercisable, June 30, 20221,303,217 $2.47 $249,903 
Vested and expected to vest, June 30, 20222,924,061 $1.68  $561,936