6. Supplementary Balance Sheet Information

The following tables provide the details of selected balance sheet items as of December 31, 2011 and 2010:

Inventories


	December 31,
	2011		2010
	(In thousands)
Raw materials	$	34,131	$	37,315
Work-in-process		18,506		16,613
Finished goods		11,048		10,261
Demo inventory		1,431		1,249
Consigned inventory		694		1,283

Total inventories	$	65,810	$	66,721

Property, Plant and Equipment, net


	December 31,
	2011			2010
	(In thousands)
Cost:
Land, buildings and improvements	$	46,469		$	48,545
Machinery and equipment		56,685			52,193

Total cost		103,154			100,738
Accumulated depreciation		(59,743	)		(55,336	)

Net property, plant and equipment	$	43,411		$	45,402

In 2011, the Company capitalized $2.2 million of assets which met the capital lease criteria of ASC 840-30 “Leases—Capital Lease”. The assets acquired under the capital lease are included in machinery and equipment. Depreciation expense, including amortization of demo units and the capital lease, was $7.9 million, $7.4 million and $7.7 million for 2011, 2010 and 2009, respectively. Accumulated amortization related to the capital lease totaled $0.1 million as of December 31, 2011.

Prepaid Expenses and Other Current Assets


	December 31,
	2011		2010
	(In thousands)
Prepaid expenses	$	4,694	$	4,803
Other current assets		1,275		777

Total	$	5,969	$	5,580

Other Accrued Expenses


	December 31,
	2011		2010
	(In thousands)
Accrued warranty	$	3,506	$	3,977
Customer deposits		3,630		1,241
Other		8,933		9,499

Total	$	16,069	$	14,717

Accrued Warranty


	December 31,
	2011			2010
	(In thousands)
Balance at beginning of period	$	3,977		$	3,140
Provision charged to cost of goods sold		3,250			4,359
Use of provision		(3,718	)		(3,492	)
Foreign currency exchange rate changes		(3	)		(30	)

Balance at end of period	$	3,506		$	3,977