Property and Equipment

12 Months Ended

Dec. 31, 2015

Property and Equipment

Property and Equipment

5. Property and Equipment

        As of December 31, 2015 and December 31, 2014, property and equipment, net consists of the following (in thousands):

	2015			2014			Depreciable Lives
Computer equipment	$	2,426		$	2,005		3 years
Software		9,900			9,001		3 years
Office furniture and equipment		2,524			2,436		5 to 6 years
Laboratory equipment		43,286			40,626		7 years
Leasehold improvements		12,735			12,735		Shorter of asset life or lease term
Less: accumulated depreciation		(48,975	)		(41,381	)
	$	21,896		$	25,422

        During 2015 and 2014, the Company disposed of laboratory equipment with total gross carrying amount of $0.3 million and $0.2 million, respectively, and accumulated depreciation of $0.3 million and $0.2 million, respectively. Depreciation and amortization expense amounted to $7.9 million, $7.6 million and $7.1 million for the years ended December 31, 2015, 2014 and 2013, respectively.