|
Related Parties (Details Textual) (USD $)
|
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2000
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| 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 | 1,628,000 | 1,552,000 | ||
| 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 | $ 11,763,000 | $ 6,458,000 | $ 7,119,000 | |