Income Taxes Statutory Rate Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income Tax Holiday, Termination Date	5 years
Income Tax Reconciliation, Tax Holidays	$ 3,000	$ 1,000	$ 500
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.11	$ 0.04	$ 0.02
Income Tax Provision Reconcilation [Abstract]
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate	$ (5,136)	$ (6,602)	$ (5,220)
Income Tax Reconciliation, Tax Credits	(169)	(282)	(525)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential	(7,583)	1,256	(3,890)
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance	13,338	5,872	8,488
Income Tax Expense (Benefit)	$ 450	$ 244	$ (1,147)