Annual report pursuant to Section 13 and 15(d)

Acquisition of American DG Energy Inc. - Assets Acquired and Liabilities Assumed in Acquisition (Details)

v3.19.1
Acquisition of American DG Energy Inc. - Assets Acquired and Liabilities Assumed in Acquisition (Details) - USD ($)
12 Months Ended
May 18, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Business Acquisition [Line Items]        
Tecogen common stock - 4,662,937 shares   $ 0 $ 18,482,656  
Assumed fully vested equity awards   0 114,896  
Financial liabilities   (6,292,599) (7,729,667)  
Noncontrolling interest in American DG New York, LLC   255,116 455,611  
Goodwill   $ 8,975,065 $ 13,365,655 $ 40,870
American DG Energy        
Business Acquisition [Line Items]        
Tecogen common stock - 4,662,937 shares $ 18,745,007      
Assumed fully vested equity awards 114,896      
Equity consideration 18,859,903      
Financial assets 1,542,137      
Inventory 75,374      
Prepaid and other current assets 358,628      
Property, plant and equipment 12,186,664      
Investment securities 519,568      
Favorable contract asset 1,561,739      
Financial liabilities (1,912,859)      
Unfavorable contract liability (8,341,922)      
Other liabilities (939)      
Cash payable 5,988,390      
Noncontrolling interest in American DG New York, LLC (453,272)      
Goodwill 13,324,785      
Consideration transferred $ 18,859,903