Supplementary Balance Sheet Information (Tables)

3 Months Ended

Mar. 29, 2013

Inventories

Inventories

	March 29, 2013		December 31, 2012
Raw materials	$	40,247	$	30,554
Work-in-process		10,448		11,959
Finished goods		11,562		8,023
Demo and consigned inventory		2,645		2,265
Total inventories	$	64,902	$	52,801

Accrued Expenses and Other Current Liabilities

Accrued Expenses and Other Current Liabilities

	March 29, 2013		December 31, 2012
Accrued compensation and benefits	$	7,632	$	6,655
Accrued warranty		3,550		2,777
Customer deposits		1,527		3,033
Other		9,647		6,497
Total	$	22,356	$	18,962

Accrued Warranty

Accrued Warranty

	Three Months Ended
	March 29, 2013			March 30, 2012
Balance at beginning of the period	$	2,777		$	3,035
Provision charged to cost of sales		297			683
Acquisition related warranty accrual		998			—
Use of provision		(469	)		(867	)
Foreign currency exchange rate changes		(53	)		47
Balance at end of period	$	3,550		$	2,898