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Accounts payable and accrued liabilities
3 Months Ended
Mar. 31, 2016
Payables and Accruals [Abstract]  
Accounts payable and accrued liabilities
Accounts payable and accrued liabilities

Accounts payable and accrued liabilities consisted of the following (in thousands):
 
March 31,
 
December 31,
 
2016
 
2015
 
 
 
 
Accounts payable
$
3,236

 
$
2,104

Accrued expenses
5,785

 
5,311

Accrued compensation and benefits
1,762

 
2,352

Other current liabilities
33

 
31

 
$
10,816

 
$
9,798