Related Party Transactions (Details) - USD ($) $ in Thousands |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Jul. 31, 2014 |
Feb. 27, 2012 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
Dec. 31, 2012 |
|
| 5 Elements Global Advisors | ||||||
| Related Party Transaction [Line Items] | ||||||
| Ownership in reporting entity by related party | 2.30% | |||||
| 5 Elements Efficiencies (BVI) Ltd. | ||||||
| Related Party Transaction [Line Items] | ||||||
| Ownership in reporting entity by related party | 2.50% | |||||
| 5 Elements Efficiencies (BVI) Ltd. | Yeh-Mei Cheng | ||||||
| Related Party Transaction [Line Items] | ||||||
| Ownership interest | 50.00% | |||||
| Communal | ||||||
| Related Party Transaction [Line Items] | ||||||
| Ownership in reporting entity by related party | 5.00% | |||||
| Related party transaction, term of agreement | 60 months | |||||
| Amount paid | $ 425 | $ 523 | ||||
| Recorded expense | $ 226 | $ 226 | $ 226 | |||
| Communal | 5 Elements Efficiencies (BVI) Ltd. | ||||||
| Related Party Transaction [Line Items] | ||||||
| Ownership interest | 50.00% | |||||