Balance Sheet Details (Accumulated other comprehensive income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Accumulated other comprehensive income
Balance at December 31, 2013	$ 17,123
Other comprehensive income before reclassification	(10,445)
Net other comprehensive income for the year ended December 31, 2014	(12,400)
Balance at December 31, 2014	4,723
Foreign Currency Translation Adjustment [Member]
Accumulated other comprehensive income
Balance at December 31, 2013	18,804
Other comprehensive income before reclassification	(10,445)
Net other comprehensive income for the year ended December 31, 2014	(10,445)
Balance at December 31, 2014	8,359
Defined Benefit Pension Plan [Member]
Accumulated other comprehensive income
Balance at December 31, 2013	(1,681)
Other comprehensive income before reclassification	0
Net other comprehensive income for the year ended December 31, 2014	(1,955)
Balance at December 31, 2014	(3,636)
Cost of Sales, Selling General and Administrative and Research and Development Expense [Member]
Accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive income (loss)	(1,955)
Cost of Sales, Selling General and Administrative and Research and Development Expense [Member] | Foreign Currency Translation Adjustment [Member]
Accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive income (loss)	0
Cost of Sales, Selling General and Administrative and Research and Development Expense [Member] | Defined Benefit Pension Plan [Member]
Accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive income (loss)	$ (1,955)