Property and Equipment, Net

12 Months Ended

Dec. 31, 2015

Property Plant And Equipment [Abstract]

Property and Equipment, Net

Note 4. Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):

	As of December 31,
	2015			2014
Laboratory equipment	$	2,528		$	2,697
Software and computer equipment		441			465
Furniture and fixtures		153			151
Vehicles		204			188
Leasehold improvements		1,900			1,882
Assets under construction		18			—
Property and equipment, gross		5,244			5,383
Less accumulated depreciation and amortization		(4,659	)		(4,655	)
Property and equipment, net	$	585		$	728

Depreciation and amortization expense is $294,000 and $358,000 for the years ended December 31, 2015 and 2014, respectively.