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Property and Equipment, Net
 12 Months Ended
Dec. 31, 2017
Property Plant And Equipment [Abstract]  
Property and Equipment, Net

4. Property and Equipment, Net

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

 

 

 

December 31,

 

 

 

2017

 

 

2016

 

Laboratory equipment

 

$

510

 

 

$

484

 

Computer software and equipment

 

 

181

 

 

 

185

 

Office furniture and equipment

 

 

201

 

 

 

201

 

Leasehold improvements

 

 

915

 

 

 

920

 

 

 

 

1,807

 

 

 

1,790

 

Less: Accumulated depreciation and amortization

 

 

(643

)

 

 

(290

)

 

 

$

1,164

 

 

$

1,500

 

 

Depreciation and amortization expense was $0.4 million, $0.3 million and less than $0.1 million for the years ended December 31, 2017, 2016 and 2015, respectively.