Property and Equipment

12 Months Ended

Dec. 31, 2015

Property and equipment at December 31, 2015 and 2014 are as follows:



	Estimated Useful Lives		As of December 31,
	In Years		2015			2014
			(in thousands)
Computers and software	3-5		$	8,457		$	9,468
Furniture and fixtures	5-7		6,269			7,032
Laboratory equipment	3-7		3,908			12,737
Leasehold improvements	7-10		240			8,117
Buildings	15-40		59,117			—
Land		—	2,664			—
Total property and equipment			80,655			37,354
Less: Accumulated depreciation and amortization			(59,428		)	(36,274		)
Net property and equipment			$	21,227		$	1,080

Buildings of $59.1 million and land of $2.7 million, as well as $38.0 million of related accumulated depreciation, have been reclassified to assets held for sale as of December 31, 2014. In 2015, these assets were reclassified to assets held and used, and are therefore disclosed as property and equipment as of December 31, 2015 (see Note 6, Buildings and Land for Sale).