Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Unrecognized tax benefits	$ 1,300
Effective tax rate	40.20%	31.10%
Net non-current deferred tax liability	$ 14,220		$ 12,853
Cash and cash equivalents	10,887	$ 9,016	$ 10,113	$ 8,811
Cash and cash equivalents indefinitely reinvested in Chinese operations	8,800
Unremitted earnings of foreign subsidiaries	9,400
Unrecognized deferred tax liability on unremitted earnings of foreign subsidiaries	2,400
Domestic Tax Authority [Member] | IRS [Member]
Income Taxes [Abstract]
Income Tax Examination, Potential Disallowed Research Credits	$ 1,600