Prepaid expenses and other current assets (Tables)
12 Months Ended
Dec. 31, 2014
Prepaid expenses and other current assets  
Schedule of prepaid expenses and other current assets

        Prepaid expenses and other current assets consist of the following (in thousands):

                                                                                                                                                                                    

 

 

December 31,
2013

 

December 31,
2014

 

Receivable from unsettled at-the-market equity transactions

 

$

 

$

2,085 

 

Prepaid contract research organization costs

 

 

411 

 

 

238 

 

Receivable related to tenant improvement allowance

 

 

 

 

150 

 

Interest receivable

 

 

123 

 

 

113 

 

Prepaid other

 

 

23 

 

 

55 

 

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$

557 

 

$

2,641 

 

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