Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Description of business and basis of presentation - Additional Information (Details)
6 Months Ended
May 18, 2017
Jun. 30, 2019
USD ($)
segment
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Business Acquisition [Line Items]        
Ownerhsip interest in American DG New York, LLC (percent)   51.00%    
Number of business segments | segment   2    
Right of use assets   $ 2,421,581 $ 0  
American DG Energy, Inc.        
Business Acquisition [Line Items]        
Ownership interest (percent) 100.00%      
Accounting Standards Update 2018-15        
Business Acquisition [Line Items]        
Capitalization of certain implementation costs       $ 85,372
Other Assets | Adjustments for New Accounting Pronouncement        
Business Acquisition [Line Items]        
Right of use assets   2,420,000    
Other Current Liabilities | Adjustments for New Accounting Pronouncement        
Business Acquisition [Line Items]        
Operating lease liabilities, current   520,000    
Other Noncurrent Liabilities | Adjustments for New Accounting Pronouncement        
Business Acquisition [Line Items]        
Operating lease liabilities, noncurrent   $ 1,900,000