Segment Reporting (Summary of Revenues and Long-Lived Assets by Geographic Region) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Revenue	$ 68,033	$ 53,853	$ 127,399	$ 110,739
Long-Lived Assets	148,647		148,647		$ 142,161
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Revenue	67,550	52,757	126,089	105,717
Long-Lived Assets	101,430		101,430		100,404
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	33,835		33,835		28,547
FRANCE
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Revenue	483	$ 1,096	1,310	$ 5,022
Long-Lived Assets	$ 13,382		$ 13,382		$ 13,210