Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Liabilities Other Than Goodwill -Amounts related to intangible assets (Details)

Intangible Assets and Liabilities Other Than Goodwill -Amounts related to intangible assets (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 3,731,563	$ 3,498,307
Less - accumulated amortization	(796,284)	(601,849)
Intangible assets, net	2,935,279	2,896,458
Unfavorable contract liability	7,912,275	8,341,922
Less - accumulated amortization	(1,378,201)	(612,255)
Unfavorable contract liability, net	6,534,074	7,729,667
Product Certifications
Finite-Lived Intangible Assets [Line Items]
Intangible assets	726,159	605,704
Less - accumulated amortization	(329,812)	(285,341)
Intangible assets, net	396,347	320,363
Patents
Finite-Lived Intangible Assets [Line Items]
Intangible assets	888,382	808,323
Less - accumulated amortization	(182,107)	(154,972)
Intangible assets, net	706,275	653,351
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets	240,000	240,000
Less - accumulated amortization	(88,000)	(76,000)
Intangible assets, net	152,000	164,000
Favorable contract asset
Finite-Lived Intangible Assets [Line Items]
Intangible assets	1,561,739	1,561,739
Less - accumulated amortization	(195,440)	(85,536)
Intangible assets, net	1,366,299	1,476,203
TTcogen Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets	29,607	0
Less - accumulated amortization	(925)	0
Intangible assets, net	28,682	0
Trademarks
Finite-Lived Intangible Assets [Line Items]
Intangible assets	21,740	19,540
Less - accumulated amortization	0	0
Intangible assets, net	21,740	19,540
In Process R&D
Finite-Lived Intangible Assets [Line Items]
Intangible assets	263,936	263,001
Less - accumulated amortization	0	0
Intangible assets, net	$ 263,936	$ 263,001