Annual report pursuant to Section 13 and 15(d)

Related party transactions (Details)

v3.3.1.900
Related party transactions (Details)
12 Months Ended
Oct. 20, 2009
Dec. 31, 2015
USD ($)
company
Dec. 31, 2014
USD ($)
Related Party Transaction [Line Items]      
Number of affiliated companies | company   2  
Office space and warehouse facilities      
Related Party Transaction [Line Items]      
Sublease rental   $ 113,472 $ 201,440
Affiliated companies | Sublease under operating leased assets | Office space and warehouse facilities      
Related Party Transaction [Line Items]      
Sublease rental   78,468 87,880
Sublease operating expenses offset   36,672 42,366
Affiliated companies | American DG Energy      
Related Party Transaction [Line Items]      
Revenue from related parties   1,903,427 1,410,639
Related party transactions agreement term 5 years    
Related party transactions agreement term, renewal period 1 year    
Due from related party   1,177,261 $ 600,251
Chief Executive Officer (John N. Hatsopoulos)      
Related Party Transaction [Line Items]      
Officers' compensation   $ 1  
Percentage of time spent on company affairs   50.00%