Balance Sheet Details (Tables)

6 Months Ended

Jun. 30, 2014

Balance Sheet Related Disclosures [Abstract]

Schedule of inventories

	June 30, 2014		December 31, 2013
Raw material and purchased parts	$	20,040	$	16,723
Work-in-process	2,579		2,374
Finished goods	20,781		23,149
Consigned finished goods	1,573		2,490
Total inventories	$	44,973	$	44,736

Schedule of intangible assets

Intangible assets consist of the following:

	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
As of June 30, 2014
Patents	$	2,476	$	(2,208	)	$	268
Developed core technology	1,100		(1,100		)	—
Patent license agreement	741		(741		)	—
Total intangible assets at June 30, 2014	$	4,317	$	(4,049	)	$	268

	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 June 30, 2014 is as follows:

Balance at December 31, 2013	$	25,978
Foreign currency translation adjustments	162
Balance at June 30, 2014	$	26,140

Schedule of accrued warranty

	Six Months Ended
	June 30,
	2014			2013
Beginning balance	$	180		$	269
Product warranties issued	233			180
Change related to preexisting warranties	236			(132		)
Settlement of warranties	(67		)	(138		)
Foreign currency translation adjustments	1			(3		)
Ending balance	$	583		$	176

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	632		—			632
Amounts reclassified from accumulated other comprehensive income	—		58			58		Cost of Sales, Selling, General and Administrative and Research and Development Expense
Net other comprehensive income for the six months ended June 30, 2014	632		58			690
Balance as of June 30, 2014	$	19,436	$	(1,623	)	$	17,813