Supplementary Balance Sheet Information (Tables)

3 Months Ended

Mar. 28, 2014

Inventories

Inventories

	March 28, 2014		December 31, 2013
Raw materials	$	39,152	$	34,749
Work-in-process		9,724		9,744
Finished goods		12,023		10,682
Demo and consigned inventory		2,935		3,115
Total inventories	$	63,834	$	58,290

Accrued Expenses and Other Current Liabilities

Accrued Expenses and Other Current Liabilities

	March 28, 2014		December 31, 2013
Accrued compensation and benefits	$	7,288	$	8,624
Accrued warranty		3,310		3,315
Customer deposits		670		551
Other		10,607		9,798
Total	$	21,875	$	22,288

Accrued Warranty

Accrued Warranty

	Three Months Ended
	March 28, 2014			March 29, 2013
Balance at beginning of the period	$	3,315		$	2,204
Provision charged to cost of sales		481			257
Acquisition related warranty accrual		90			998
Use of provision		(571	)		(366	)
Foreign currency exchange rate changes		(5	)		(53	)
Balance at end of period	$	3,310		$	3,040