Quarterly report pursuant to Section 13 or 15(d)

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

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Acquisition of American DG Energy, Inc. - Additional information (Details)
 3 Months Ended 6 Months Ended
May 18, 2017
shares
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Business Acquisition [Line Items]            
Excess of Cost over Fair Value of Net Assets Acquired         $ 0  
Energy production revenue   $ 774,192 $ 0   774,192 $ 0
Gross profit   2,986,622 $ 2,102,894   5,901,293 $ 3,822,238
Payment of stock issuance costs       $ 0 (365,566)  
Shares issued in acquisition (shares) | shares 4,662,937          
Discount rate used to calculate fair value of noncontrolling interest (percent) 5.61%          
General and Administrative Expense            
Business Acquisition [Line Items]            
Acquisition related costs   99,773     118,853  
American DG Energy, Inc.            
Business Acquisition [Line Items]            
Ownership interest (percent) 100.00%          
Energy production revenue   1,047,882        
Gross profit   $ 469,075     $ 443,649  
Common Stock [Member]            
Business Acquisition [Line Items]            
Conversion ratio of American DG shares to Tecogen shares 0.092