Segment Reporting and Geographic Information (External Revenue and Long-Lived Assets by Geographic Region) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 38,773	$ 42,318
Long-Lived Assets	4,608		4,890
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	2,909		3,078
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	10,251	12,856
Americas (Excluding the U.S.) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	2,763	556
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	20,818	26,579
Long-Lived Assets	1,674		1,786
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	17,200	20,400
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	4,941	2,327
Long-Lived Assets	25		26
Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 4,400	$ 1,400