Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents [Line Items]
Cash denominated in U.S. dollars	$ 24,918	$ 2,897
Money market funds denominated in U.S. dollars	0	13,085
Cash in currency other than U.S. dollars	33	41
Cash and Cash Equivalents, at Carrying Value	$ 24,951	$ 16,023	$ 33,586