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Property and Equipment
 12 Months Ended
Dec. 31, 2017
Property and Equipment  
Property and Equipment

4. Property and Equipment

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

 

 

 

 

 

 

 

 

 

 

 

December 31,

 

 

 

2017

 

2016

 

Laboratory equipment

    

$

1,684

    

$

1,367

 

Office equipment

 

 

139

 

 

139

 

 

 

 

1,823

 

 

1,506

 

Less: accumulated depreciation

 

 

(484)

 

 

(358)

 

 

 

$

1,338

 

$

1,148

 

 

Depreciation expense was $126 thousand,  $23 thousand, and $11 thousand for the years ended December 31, 2017, 2016 and 2015, respectively.