Property and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment

Property and equipment and related accumulated depreciation are as follows (in thousands):

	Estimated Useful Life (Years)	December 31,
		2017			2016
Lab equipment	5	$	443		$	457
Furniture and fixtures	4	16			16
Computer equipment	3	73			73
Software	3	28			28
Leasehold improvements	Lesser of useful life or remaining lease term	293			293
		853			867
Less accumulated depreciation and amortization		(331		)	(71		)
Total property and equipment, net		$	522		$	796

Depreciation expense amounted to $285,000, $178,000 and $366,000 for the years ended December 31, 2017, 2016 and 2015, respectively. During the years ended December 31, 2017 and 2016, the Company disposed/sold property and equipment with a net book value of $0 and $299,000, respectively, for proceeds of $98,000 and $325,000, respectively.