Related Parties (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2000	Dec. 31, 2014
Related Parties - Enel (Additional Textual) [Abstract]
Stock Issued During Period, Value, New Issues			$ 130,700,000
Stock Issued During Period, Shares, New Issues			3,000,000
Accounts receivable balance related to amounts owed by Enel and its designated manufacturers	341,000			158,000
Number of shares sold by Related Party.	0
Number of board members Related Party can nominate	1
Number of Related Party Representatives on Board	0
Revenue from Related Parties	$ 788,000	$ 1,549,000