Balance Sheet Details (Tables)

3 Months Ended

Mar. 31, 2014

Balance Sheet Related Disclosures [Abstract]

Schedule of inventories

	March 31, 2014		December 31, 2013
Raw material and purchased parts	$	16,759	$	16,723
Work-in-process	3,344		2,374
Finished goods	24,297		23,149
Consigned finished goods	603		2,490
Total inventories	$	45,003	$	44,736

Schedule of intangible assets

Intangible assets consist of the following:

	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
As of March 31, 2014
Patents	$	2,476	$	(2,158	)	$	318
Developed core technology	1,100		(1,100		)	—
Patent license agreement	741		(741		)	—
Total intangible assets at March 31, 2014	$	4,317	$	(3,999	)	$	318

	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
As of December 31, 2013
Patents	$	2,476	$	(2,107	)	$	369
Developed core technology	1,100		(1,100		)	—
Patent license agreement	741		(741		)	—
Total intangible assets at December 31, 2013	$	4,317	$	(3,948	)	$	369

Schedule of change in the carrying amount of goodwill

The change in the carrying amount of goodwill from December 31, 2013 to March 31, 2014 is as follows:

Balance at December 31, 2013	$	25,978
Foreign currency translation adjustments	223
Balance at March 31, 2014	$	26,201

Schedule of accrued warranty

	Three Months Ended
	March 31,
	2014			2013
Beginning balance	$	180		$	269
Product warranties issued	114			86
Change related to preexisting warranties	260			(80		)
Settlement of warranties	(30		)	(4		)
Foreign currency translation adjustments	(12		)	(4		)
Ending balance	$	512		$	267

Schedule of accumulated other comprehensive income

	Foreign Currency Translation Adjustment		Defined Benefit Pension Plan			Accumulated Other Comprehensive Income		Affected Line Items in the Statement of Operations
Balance as of December 31, 2013	$	18,804	$	(1,681	)	$	17,123
Other comprehensive income before reclassification	849		—			849
Amounts reclassified from accumulated other comprehensive income	—		29			29		Cost of Sales, Selling, General and Administrative and Research and Development Expense
Net other comprehensive income for the three months ended March 31, 2014	849		29			878
Balance as of March 31, 2014	$	19,653	$	(1,652	)	$	18,001