Supplementary Balance Sheet Information (Tables)

6 Months Ended

Jun. 27, 2014

Inventories

Inventories

	June 27, 2014		December 31, 2013
Raw materials	$	39,369	$	34,749
Work-in-process		10,637		9,744
Finished goods		11,622		10,682
Demo and consigned inventory		2,922		3,115
Total inventories	$	64,550	$	58,290

Accrued Expenses and Other Current Liabilities

Accrued Expenses and Other Current Liabilities

	June 27, 2014		December 31, 2013
Accrued compensation and benefits	$	9,360	$	8,624
Accrued warranty		3,416		3,315
Customer deposits		612		551
Other		7,377		9,798
Total	$	20,765	$	22,288

Accrued Warranty

Accrued Warranty

	Six Months Ended
	June 27, 2014			June 28,     2013
Balance at beginning of the period	$	3,315		$	2,204
Provision charged to cost of sales		976			791
Acquisition related warranty accrual		90			998
Use of provision		(973	)		(755	)
Foreign currency exchange rate changes		8			(47	)
Balance at end of period	$	3,416		$	3,191