Annual report pursuant to Section 13 and 15(d)

Related party transactions (Details)

v3.6.0.2
Related party transactions (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Office space and warehouse facilities    
Related Party Transaction [Line Items]    
Sublease rental $ 63,842 $ 113,472
Affiliated companies | Sublease under operating leased assets | Office space and warehouse facilities    
Related Party Transaction [Line Items]    
Sublease rental 48,092 78,468
Sublease operating expenses offset 22,519 36,672
Affiliated companies | American DG Energy    
Related Party Transaction [Line Items]    
Revenue from related parties 957,760 1,903,427
Due from related party 87,287.7 1,177,261
Affiliated companies | TTcogen, LLC    
Related Party Transaction [Line Items]    
Revenue from related parties 93,143 0
Due from related party 107,377 0
Affiliated companies | Tedom USA    
Related Party Transaction [Line Items]    
Due from related party 692 0
Affiliated companies | Ultratek    
Related Party Transaction [Line Items]    
Revenue from related parties 22,238 0
Due from related party 65,631 $ 0
Chief Executive Officer (John N. Hatsopoulos)    
Related Party Transaction [Line Items]    
Officers' compensation $ 1  
Percentage of time spent on company affairs 50.00%