8. Supplementary Balance Sheet Information

The following tables provide the details of selected balance sheet items as of the periods indicated (in thousands):

Inventories


	September 28, 2012		December 31, 2011
Raw materials	$	32,150	$	30,406
Work-in-process		12,373		12,943
Finished goods		6,929		6,563
Demo and consigned inventory		1,979		1,627

Total inventories	$	53,431	$	51,539

Accrued Expenses and Other Current Liabilities


	September 28, 2012		December 31, 2011
Accrued compensation and benefits	$	6,095	$	7,512
Accrued warranty		2,852		3,035
Customer deposits		2,540		380
Other		7,822		8,000

Total	$	19,309	$	18,927

Accrued Warranty


	Nine Months Ended
	September 28, 2012			September 30, 2011
Balance at beginning of the period	$	3,035		$	3,174
Provision charged to cost of goods sold		1,958			1,787
Use of provision		(2,191	)		(1,927	)
Foreign currency exchange rate changes		50			15

Balance at end of period	$	2,852		$	3,049