Property and Equipment, Net

12 Months Ended

Dec. 31, 2013

Property Plant And Equipment [Abstract]

9. Property and Equipment, Net

Property and equipment consisted of the following:


	December 31,
(in thousands)	2013			2012
Lab equipment	$	13,714		$	12,616
IT equipment		2,701			2,346
Leasehold improvements		10,523			8,200
Furniture and fixtures		340			330
Construction in process		7,635			1,774

		34,913			25,266
Less: Accumulated depreciation and amortization		(21,549	)		(18,969	)

	$	13,364		$	6,297

Depreciation expense was $2.8 million, $3.5 million and $5.0 million for the years ended December 31, 2013, 2012 and 2011, respectively. Capitalized interest costs were immaterial for the years ended December 31, 2013 and 2012. There were no capitalized interest costs for the year ended December 31, 2011.

During the years ended December 31, 2013 and 2012, the Company disposed of $0.2 million and $0.7 million of fully depreciated assets. No fixed assets were disposed of or sold during the year ended December 31, 2011.

There were no recognized impairment charges related to fixed assets in the years ended December 31, 2013, 2012 or 2011.

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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