BALANCE SHEET DETAILS

We had restricted cash of $1.9 million as of December 31, 2012 and December 31, 2011, which is related to secured standby letters of credit provided to certain landlords and vendors. See Note 6. Commitments and Contingencies for additional details of the standby letters of credit.

Components of inventories as of December 31, 2012 and December 31, 2011 are shown below (in thousands):



	December 31,
	2012		2011
Inventories:
Purchased parts and raw materials	$	20,820	$	17,693
Work-in-process	3,186		7,266
Finished goods	9,303		4,244
	$	33,309	$	29,203

Amounts in the table are presented net of inventory valuation charges for excess and/or obsolete inventories. For the years ended December 31, 2012, 2011 and 2010, we recorded net benefits of approximately $1.6 million, $1.7 million and $3.1 million, respectively, due to a decrease in the amount of written down inventory.

Components of prepaid expenses and other current assets as of December 31, 2012 and December 31, 2011 are shown below (in thousands):



	December 31,
	2012		2011
Prepaid expenses and other current assets:
Value-added tax	$	1,133	$	2,996
Retirement insurance - foreign employees	1,432		1,185
Other current assets	1,996		4,843
	$	4,561	$	9,024

At December 31, 2012 and 2011, we recorded $1.4 million and $1.2 million, respectively, in retirement insurance assets, which represent our contributions to a restricted account for retirement benefits for certain of our foreign employees. We record the corresponding obligation for these benefits in accrued compensation and benefits in the accompanying consolidated balance sheets.

Components of property and equipment as of December 31, 2012 and December 31, 2011 are shown below (in thousands):



	December 31,
	2012			2011
Property and equipment, net:
Machinery and equipment	$	43,853		$	45,174
Furniture and fixtures	9,985			10,002
Leasehold improvements	18,035			17,759
	71,873			72,935
Less: accumulated depreciation	(64,486		)	(62,383		)
	$	7,387		$	10,552

Components of other current liabilities as of December 31, 2012 and December 31, 2011 are shown below (in thousands):



	December 31,
	2012		2011
Other current liabilities:
Warranty	$	1,691	$	3,419
Value-added tax	435		2,073
Restructuring	3,437		1,230
Other	1,955		3,944
	$	7,518	$	10,666