Balance Sheet Details

Property, Plant and Equipment, net

Property, plant and equipment, net is comprised of the following:



	As of December 31,
	2014			2013
	(In thousands)
Building	$	40,320		$	40,320
Computer software	21,412			22,068
Computer equipment	27,744			29,869
Furniture and fixtures	13,464			12,360
Leasehold improvements	7,052			7,024
Machinery	11,699			11,533
Construction in progress	425			282
	122,116			123,456
Less accumulated depreciation and amortization	(58,093		)	(50,814		)
	$	64,023		$	72,642

As a result of the impairment analysis in the fourth quarter of 2013, the Company concluded that its LDT asset group was not able to recover the carrying amount of its LDT assets. Upon completion of this analysis, the Company recorded an impairment charge of $3.5 million, $0.5 million and $0.2 million primarily for building improvements, machinery and equipment, and software in its LDT asset group, respectively, which have been netted from the gross carrying amount and accumulated depreciation. As a result of the interim impairment analysis in the third quarter of 2012, the Company concluded that its LDT asset group was not able to recover the carrying amount of its LDT assets. Upon completion of this analysis, the Company recorded an impairment charge of $5.8 million and $0.6 million for building improvements and software in its LDT asset group, respectively, which have been netted from the gross carrying amount and accumulated depreciation. See Note 6, "Intangible Assets and Goodwill" for additional details.

As the Company undertook a series of structural improvements to ready the Sunnyvale and Brecksville facilities for its use and retained sufficient continuing involvement to preclude de-recognition of the buildings under the FASB authoritative guidance applicable to sale leaseback for real estate, the Company accounts for the buildings as owned real estate. On January 31, 2013, the Company entered into a third amendment to the Sunnyvale lease to surrender the 31,000 square-foot space from the first amendment back to the landlord and recorded a total charge of $2.0 million related to the surrender of the 31,000 square-foot space.

As of December 31, 2014 and 2013, for the Sunnyvale and Brecksville facilities, the Company had capitalized $40.3 million in building based on the estimated fair value of the portion of the unfinished spaces, capitalized interest on the unfinished spaces and construction costs related to the build-out of the facilities. See Note 12, "Commitments and Contingencies" for additional details.

Depreciation expense for the years ended December 31, 2014, 2013 and 2012 was $13.6 million, $15.5 million and $13.2 million, respectively.

Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss is comprised of the following:



	As of December 31,
	2014			2013
	(In thousands)
Foreign currency translation adjustments, net of tax	$	86		$	86
Unrealized loss on available-for-sale securities, net of tax	(488		)	(391		)
Total	$	(402	)	$	(305	)