Quarterly report pursuant to Section 13 or 15(d)

Description of business and basis of presentation - Additional Information (Details)

v3.10.0.1
Description of business and basis of presentation - Additional Information (Details)
9 Months Ended
May 18, 2017
Sep. 30, 2018
segment
Jan. 01, 2018
USD ($)
Business Acquisition [Line Items]      
Ownerhsip interest in American DG New York, LLC (percent)   51.00%  
Number of business segments | segment   2  
American DG Energy, Inc.      
Business Acquisition [Line Items]      
Ownership interest (percent) 100.00%    
AOCI Attributable to Parent | Adjustments for New Accounting Pronouncement      
Business Acquisition [Line Items]      
Cumulative Effect of New Accounting Principle in Period of Adoption | $     $ 165,317