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Concentrations and Associated Credit Risk (Tables)

9 Months Ended

Sep. 30, 2018

Revenues [Member]

Concentration Risk [Line Items]

Schedule of concentration risk

		Nine Months Ended September 30,
		2018				2017
Con Edison			12	%			16	%
ComEd			na				11	%

na-less than 10% of consolidated revenue in the period

Accounts receivable [Member]

Concentration Risk [Line Items]

Schedule of concentration risk

		September 30, 2018				December 31, 2017
Con Edison			12	%			11	%

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