Supplementary Balance Sheet Information (Tables)

6 Months Ended

Jun. 28, 2013

Inventories

Inventories

	June 28, 2013		December 31, 2012
Raw materials	$	38,609	$	30,554
Work-in-process		11,549		11,959
Finished goods		9,727		8,023
Demo and consigned inventory		2,670		2,265
Total inventories	$	62,555	$	52,801

Accrued Expenses and Other Current Liabilities

Accrued Expenses and Other Current Liabilities

	June 28, 2013		December 31, 2012
Accrued compensation and benefits	$	9,198	$	6,655
Accrued warranty		3,583		2,777
Customer deposits		1,120		3,033
Other		8,764		6,497
Total	$	22,665	$	18,962

Accrued Warranty

Accrued Warranty

	Six Months Ended
	June 28, 2013			June 29, 2012
Balance at beginning of the period	$	2,777		$	3,035
Provision charged to cost of sales		831			1,578
Acquisition related warranty accrual		998			—
Use of provision		(976	)		(1,699	)
Foreign currency exchange rate changes		(47	)		18
Balance at end of period	$	3,583		$	2,932