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Balance Sheet Components (Tables)
6 Months Ended
Jun. 30, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]  
Schedule of Property and Equipment, Net

Property and equipment, net consists of the following (in thousands):

 

     As of
June 30,
2014
    As of
December 31,
2013
 

Research and manufacturing equipment

   $ 10,591      $ 9,045   

Computer equipment

     511        496   

Furniture and fixtures

     518        451   

Leasehold improvements

     3,632        3,632   

Construction in progress

     10,279        8,880   
  

 

 

   

 

 

 

Total property and equipment

     25,531        22,504   

Less: accumulated depreciation

     (9,207     (8,189
  

 

 

   

 

 

 

Property and equipment, net

   $ 16,324      $ 14,315   
  

 

 

   

 

 

 
Schedule of Prepaid Expenses and Other Current Assets

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

 

     As of
June 30,
2014
     As of
December 31,
2013
 

Prepaid expenses

   $ 1,462       $ 531   

Reimbursable tenant improvements

     1,109         —    

Accounts receivable

     188         225   

Deferred rent, current portion

     282         —    

Other current assets

     134         69   
  

 

 

    

 

 

 

Total prepaid expenses and other current assets

   $ 3,175       $ 825   
  

 

 

    

 

 

Schedule of Accruals and Other Current Liabilities

Accruals and other current liabilities consist of the following (in thousands):

 

     As of
June 30,
2014
     As of
December 31,
2013
 

Accrued construction-in-progress obligations

   $ 240       $ 1,757   

Accrued reimbursable tenant improvements

     1,109         —    

Accrued compensation

     1,316         689   

Accrued clinical trial expenses

     388         169   

Accrued interest on notes payable

     61         478   

Accrued offering costs

     402        506   

Other current liabilities

     1,517         562   
  

 

 

    

 

 

 

Total accruals and other current liabilities

   $ 5,033       $ 4,161   
  

 

 

    

 

 

Schedule of Other Non-Current Assets

Other non-current assets consist of the following (in thousands):

 

     As of
June 30,
2014
     As of
December 31,
2013
 

Deferred initial public offering costs

   $ —        $ 2,812   

Unamortized debt issuance costs

     —          194   
  

 

 

    

 

 

 

Total other non-current assets

   $ —        $ 3,006