Financial Instruments - Schedule of Fair Value On a Recurring and Non-recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Marketable securities	$ 913
Total current assets recorded at fair value	913
Restricted cash	3,941	3,964
Total non-current assets recorded at fair value	3,941	3,964
Fair Value, Inputs, Level 1 [Member]
Marketable securities	913
Total current assets recorded at fair value	913
Restricted cash	3,941	3,964
Total non-current assets recorded at fair value	3,941	3,964
Fair Value, Inputs, Level 2 [Member]
Marketable securities
Total current assets recorded at fair value
Restricted cash
Total non-current assets recorded at fair value
Fair Value, Inputs, Level 3 [Member]
Marketable securities
Total current assets recorded at fair value
Restricted cash
Total non-current assets recorded at fair value