Summary of Significant Accounting Policies - Schedule of Financial Instruments Recognized at Fair Value on Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Restricted cash	$ 3,941	$ 4,011
Total financial assets	3,941	4,011
Derivative liabilities		2,169
Total financial liabilities		2,169
Fair Value, Inputs, Level 1 [Member]
Restricted cash	3,941	4,011
Total financial assets	3,941	4,011
Derivative liabilities
Total financial liabilities
Fair Value, Inputs, Level 2 [Member]
Restricted cash
Total financial assets
Derivative liabilities
Total financial liabilities
Fair Value, Inputs, Level 3 [Member]
Restricted cash
Total financial assets
Derivative liabilities		2,169
Total financial liabilities		$ 2,169