Description of Business and Summary of Significant Accounting Policies (Long-lived assets by geographic location) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Long-Lived Assets [Line Items]
Total	$ 32,436	$ 38,667	$ 45,606
United States [Member]
Long-Lived Assets [Line Items]
Total	22,267	28,013	33,740
China [Member]
Long-Lived Assets [Line Items]
Total	4,148	4,991	5,444
Switzerland [Member]
Long-Lived Assets [Line Items]
Total	$ 6,021	$ 5,663	$ 6,422