Balance Sheet Components (in thousands)

Short-Term Investments



	As of
	April 1, 2012									December 31, 2011
	Cost		Unrealized Gain		Unrealized Loss			Estimated Fair Value		Cost		Unrealized Gain		Unrealized Loss			Estimated Fair Value
U.S. Treasuries	$	219,983	$	10	$	(14	)	$	219,979	$	144,673	$	34	$	(4	)	$	144,703
Certificates of Deposits	183		—		—			183		94		—		—			94
Total	$	220,166	$	10	$	(14	)	$	220,162	$	144,767	$	34	$	(4	)	$	144,797

All of the Company’s marketable securities are classified as available-for-sale investments and consist of government securities with an original maturity or remaining maturity at the time of purchase of greater than three months and no more than 12 months. Accordingly, none of our investments have unrealized losses greater than 12 months. There were no material realized gains or losses from the maturity of available-for-sale securities in three months ended April 1, 2012 and April 3, 2011.

Accounts receivable, net



	April 1, 2012			December 31, 2011
Gross accounts receivable	$	267,847		$	279,932
Less: Allowance for doubtful accounts	(1,298		)	(1,335		)
Allowance for sales returns	(13,106		)	(13,360		)
Allowance for price protection	(4,235		)	(3,930		)
Total allowances	(18,639		)	(18,625		)
Total accounts receivable, net	$	249,208		$	261,307

Inventories



	April 1, 2012		December 31, 2011
Raw materials	$	4,192	$	4,676
Finished goods	130,122		159,048
Total inventories	$	134,314	$	163,724

The Company records provisions for excess and obsolete inventory based on forecasts of future demand. While management believes the estimates and assumptions underlying its current forecasts are reasonable, there is risk that additional charges may be necessary if current forecasts are greater than actual demand.

Property and equipment, net



	April 1, 2012			December 31, 2011
Computer equipment	$	6,582		$	7,109
Furniture, fixtures and leasehold improvements	10,346			9,757
Software	20,220			19,974
Machinery and equipment	22,756			21,797
Construction in progress	208			662
	60,112			59,299
Less: accumulated depreciation and amortization	(45,396		)	(43,415		)
Total property and equipment, net	$	14,716		$	15,884

Depreciation expense for the three months ended April 1, 2012 and April 3, 2011 was $2.6 million and $2.3 million, respectively.

Intangibles, net

The following table presents changes to the Company’s purchased intangible assets:



	Gross		Accumulated Amortization			Net
April 1, 2012
Customer contracts and relationships	$	15,700	$	(1,799	)	$	13,901
Existing technology	14,000		(12,619		)	1,381
Core technology	10,800		(7,633		)	3,167
Trademarks	2,600		(2,130		)	470
Patents	1,270		(212		)	1,058
Non-compete	100		(100		)	—
Backlog	100		(100		)	—
Total intangibles, net	$	44,570	$	(24,593	)	$	19,977



	Gross		Accumulated Amortization			Net
December 31, 2011
Customer contracts and relationships	$	15,700	$	(1,308	)	$	14,392
Existing technology	14,000		(12,548		)	1,452
Core technology	10,800		(7,357		)	3,443
Trademarks	2,600		(2,021		)	579
Patents	1,270		(180		)	1,090
Non-compete	100		(100		)	—
Backlog	100		(100		)	—
Total intangibles, net	$	44,570	$	(23,614	)	$	20,956

Amortization expense related to intangibles in the three months ended April 1, 2012, and April 3, 2011, was approximately $1.0 and $1.4 million, respectively. No impairment charges were recorded in the three months ended April 1, 2012, and April 3, 2011.

Estimated amortization expense related to intangibles for each of the next five years and thereafter is as follows:



Year Ending December 31	Amount
2012 (remaining nine months)	$	2,936
2013	3,626
2014	3,301
2015	2,685
2016	2,377
Thereafter	5,052
Total expected amortization expense	$	19,977

Goodwill

The following table presents goodwill by segment as of April 1, 2012 and December 31, 2011:



	April 1, 2012		December 31, 2011
Retail	$	33,546	$	33,546
Commercial	32,043		32,043
Service Provider	$	20,355	$	20,355
Total	$	85,944	$	85,944

There were no impairments to goodwill during the three months ended April 1, 2012 and April 3, 2011.

Other accrued liabilities



	April 1, 2012		December 31, 2011
Sales and marketing programs	$	44,632	$	44,394
Warranty obligation	42,029		44,846
Freight	7,487		7,940
Other	21,847		23,300
Total other accrued liabilities	$	115,995	$	120,480