Annual report pursuant to Section 13 and 15(d)

Acquisition of American DG Energy Inc. - Additional Information (Details)

v3.20.1
Acquisition of American DG Energy Inc. - Additional Information (Details) - USD ($)
12 Months Ended
May 18, 2017
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2017
Business Acquisition [Line Items]        
Stock issuance costs netted against APIC   $ 377,246    
Goodwill   8,975,065 $ 5,281,867 $ 13,365,655
Goodwill expected to be tax deductible $ 0      
General and Administrative Expense        
Business Acquisition [Line Items]        
Acquisition related costs   $ 322,566    
American DG Energy        
Business Acquisition [Line Items]        
Ownership interest (percent) 100.00%      
Goodwill $ 13,300,000