Segment Reporting and Geographic Information (External Revenue and Long-Lived Assets by Geographic Region) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 37,275	$ 43,170	$ 118,762	$ 128,612
Long-Lived Assets	4,603		4,603		$ 4,890
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	2,961		2,961		3,078
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	10,368	13,254	34,239	39,665
Americas (Excluding the U.S.) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	1,297	197	5,917	879
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	19,545	25,553	63,855	78,653
Long-Lived Assets	1,622		1,622		1,786
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	14,700	21,200	50,100	63,000
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	6,065	4,166	14,751	9,415
Long-Lived Assets	20		20		$ 26
Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 5,700	$ 3,800	$ 13,500	$ 7,800