Cash and Cash Equivalents and Restricted Time Deposits (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 13,516	$ 22,422	$ 22,320	$ 27,591
United States [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	7,400	13,300
Foreign [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 6,100	$ 9,100