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Accounts Payable and Accrued Liabilities (Tables)
12 Months Ended
Dec. 31, 2015
Payables And Accruals [Abstract]  
Summary of Accounts Payable and Accrued Liabilities

Accounts payable and accrued liabilities consist of the following (in thousands):

 

 

 

December 31,

 

 

 

2015

 

 

2014

 

Accounts payable

 

$

3,905

 

 

$

5,525

 

Accrued research and development expenses

 

 

3,624

 

 

 

2,435

 

Accrued professional fees

 

 

356

 

 

 

531

 

Deferred rent

 

 

196

 

 

 

129

 

Other

 

 

148

 

 

 

84

 

Total accounts payable and accrued liabilities

 

$

8,229

 

 

$

8,704