Balance Sheet Details (Schedule of Accumulated Other Comprehensive Income) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Accumulated Other Comprehensive Income [Roll Forward]
Balance as of December 31, 2016	$ 100,822
Balance as of September 30, 2017	108,505
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income [Roll Forward]
Balance as of December 31, 2016	5,400
Other comprehensive income before reclassification	3,197
Amounts reclassified from accumulated other comprehensive income	91
Net other comprehensive income for the nine months ended September 30, 2017	3,288
Balance as of September 30, 2017	8,688
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance as of December 31, 2016	7,826
Other comprehensive income before reclassification	3,197
Amounts reclassified from accumulated other comprehensive income	0
Net other comprehensive income for the nine months ended September 30, 2017	3,197
Balance as of September 30, 2017	11,023
Defined Benefit Pension Plan
Accumulated Other Comprehensive Income [Roll Forward]
Balance as of December 31, 2016	(2,426)
Other comprehensive income before reclassification	0
Amounts reclassified from accumulated other comprehensive income	91
Net other comprehensive income for the nine months ended September 30, 2017	91
Balance as of September 30, 2017	$ (2,335)