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Accrued Expenses
6 Months Ended
Jun. 30, 2018
Payables And Accruals [Abstract]  
Accrued Expenses

5.

Accrued Expenses

Accrued expenses consisted of the following (in thousands):

 

 

June 30, 2018

 

 

December 31, 2017

 

Accrued research and development expenses

 

$

816

 

 

$

609

 

Accrued employee bonus compensation

 

 

522

 

 

 

763

 

Employee withholdings

 

 

23

 

 

 

29

 

Other accrued expenses

 

 

260

 

 

 

304

 

Total accrued expenses

 

$

1,621

 

 

$

1,705