Balance Sheet Details (Tables)

12 Months Ended

Dec. 31, 2012

Balance Sheet Related Disclosures [Abstract]

Schedule of Balance Sheet related disclosures

	December 31,
				2011
	2012			(Restated)
Inventories:
Raw material and purchased parts	$	13,114		$	9,661
Work-in-process	1,753			3,942
Finished goods	17,511			14,133
Consigned finished goods	9,242			5,498
Total inventories	$	41,620		$	33,234
Property and equipment, net:
Machinery, furniture and office equipment	$	62,593		$	53,356
Computer hardware and software	10,918			9,524
Leasehold improvements	10,376			8,253
Construction in progress	9,283			6,801
Property and equipment, gross	93,170			77,934
Less accumulated depreciation and amortization	(56,935		)	(49,393		)
Total property and equipment, net	$	36,235		$	28,541
Accounts payable and accrued liabilities:
Accounts payable	$	14,762		$	15,196
FCPA settlement	2,250			5,425
Derivative suit settlement accrual	—			3,000
Customer dispute settlement accrual	890			2,333
Income tax payable	2,068			2,362
Other accrued liabilities	7,211			7,784
Total accounts payable and accrued liabilities	$	27,181		$	36,100
	Years Ended December 31,
	2012			2011
Accrued warranty:
Beginning balance	$	258		$	449
Product warranties issued	446			343
Settlement of warranties	(259		)	(188		)
Changes related to preexisting warranties	(179		)	(354		)
Foreign currency translation adjustment	3			8
Ending balance	$	269		$	258

Schedule of accumulated other comprehensive income

	Foreign Currency Translation Adjustment		Defined Benefit Pension  Plan			Accumulated Other Comprehensive Income
Accumulated other comprehensive income:
Balance at December 31, 2011	$	14,580	$	(3,950	)	$	10,630
Current period change	1,796		105			1,901
Balance at December 31, 2012	$	16,376	$	(3,845	)	$	12,531