Property and Equipment

12 Months Ended

Dec. 31, 2018

Property Plant And Equipment [Abstract]

Property and Equipment

Note 5. Property and Equipment

The following table presents the detail of property and equipment as of the dates presented (in thousands):

	December 31, 2018			December 31, 2017
Laboratory equipment	$	14,505		$	11,223
Computer equipment and software		4,626			4,213
Furniture and fixtures		1,138			1,117
Equipment acquired under capital leases		3,972			4,468
Leasehold improvements		10,551			10,676
		34,792			31,697
Less: Accumulated depreciation		(15,014	)		(13,587	)
	$	19,778		$	18,110

Depreciation expense, which includes amortization of leased assets, was $4.5 million, $4.0 million and $2.9 million for the years ended December 31, 2018, 2017 and 2016, respectively. The net book value of property and equipment acquired under capital leases was $1.1 million and $1.7 million at December 31, 2018 and 2017, respectively.