Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Description of business and basis of presentation (Policies)
Notes Tables
Notes Details

Related party transactions (Details)

v3.10.0.1

Related party transactions (Details) - USD ($)			1 Months Ended	9 Months Ended		12 Months Ended
Related party transactions (Details) - USD ($)	May 04, 2018	Mar. 27, 2018	Jan. 31, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	May 19, 2016
Schedule of Equity Method Investments [Line Items]
Repayment of loan				$ 850,000	$ 0
Purchase of the remaining assets of Ultratek				273,814	$ 315,205
TTcogen, LLC
Schedule of Equity Method Investments [Line Items]
Equity interest in joint venture (percent)							50.00%
Tedom a.s.
Schedule of Equity Method Investments [Line Items]
Equity interest in joint venture (percent)							50.00%
Tedom USA
Schedule of Equity Method Investments [Line Items]
Equity interest in joint venture (percent)							50.00%
Initial payment to acquire Tedom USA's membership interest in TTcogen		$ 1
Payment to acquire Tedom USA'a initial investment in TTcogen, minus certain adjustments		72,597
Payment for acquisition of assets		$ 72,598
American DG Energy
Schedule of Equity Method Investments [Line Items]
Equipment purchase			$ 985,000
Co-Chief Executive Officer
Schedule of Equity Method Investments [Line Items]
Loan from related party				$ 850,000
Repayment of loan	$ 919,590
Notes Payable \| Co-Chief Executive Officer
Schedule of Equity Method Investments [Line Items]
Stated interest rate (percent)				6.00%
Ultratek \| American DG Energy
Schedule of Equity Method Investments [Line Items]
Return of investment in Ultratek						$ 2,000,000
Purchase of the remaining assets of Ultratek						$ 400,000

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