Description of Business and Summary of Significant Accounting Policies (Long-lived assets by geographic location) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 45,606	$ 36,441	$ 28,741
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	33,740	24,239	17,614
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	5,444	6,340	5,916
Switzerland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 6,422	$ 5,862	$ 5,211