Supplementary Balance Sheet Information (Tables)

9 Months Ended

Sep. 27, 2013

Inventories

Inventories

	September 27, 2013		December 31, 2012
Raw materials	$	38,328	$	30,554
Work-in-process		12,419		11,959
Finished goods		11,200		8,023
Demo and consigned inventory		3,126		2,265
Total inventories	$	65,073	$	52,801

Accrued Expenses and Other Current Liabilities

Accrued Expenses and Other Current Liabilities

	September 27, 2013		December 31, 2012
Accrued compensation and benefits	$	7,489	$	6,655
Accrued warranty		3,658		2,777
Customer deposits		1,573		3,033
Other		9,614		6,497
Total	$	22,334	$	18,962

Accrued Warranty

Accrued Warranty

	Nine Months Ended
	September 27, 2013			September 28, 2012
Balance at beginning of the period	$	2,777		$	3,035
Provision charged to cost of sales		1,399			1,958
Acquisition related warranty accrual		998			—
Use of provision		(1,517	)		(2,191	)
Foreign currency exchange rate changes		1			50
Balance at end of period	$	3,658		$	2,852