Property and Equipment, Net

12 Months Ended

Dec. 31, 2017

Property Plant And Equipment [Abstract]

Property and Equipment, Net

6. Property and Equipment, Net

Property and equipment, net consists of the following:

	December 31,
	2017		2016
Computer and office equipment	$	158	$	149
Laboratory equipment		628		795
Furniture and fixtures		27		173
Leasehold improvements		1,128		8,582
	$	1,941	$	9,699
Less accumulated depreciation and amortization		764		8,085
Property and equipment, net	$	1,177	$	1,614

Depreciation and amortization expense included in R&D expense and General and administrative expense was $495, $1,465 and $839 for the years ended December 31, 2017, 2016 and 2015, respectively.

In connection with the Company’s relocation of its operating facility from Shelton, Connecticut to Stamford, Connecticut, the Company accelerated the amortization of the Shelton leasehold improvements during the period from December 2015 (signing of the Stamford lease) to May 2016 (the date that the Shelton facility was vacated) (see Note 16, Commitments and Contingencies). In addition, during the years ended December 31, 2017 and 2016, the Company wrote-off $7,816 and $397, respectively, of fully-depreciated Shelton property and equipment, including leasehold improvements, that was not re-located to the Stamford headquarters. During the year ended December 31, 2017, the Company sold fully-depreciated Shelton property and equipment for net proceeds of $41.