Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2014
Income Tax Disclosure [Abstract]  
Reconciliation of Statutory Federal Income Tax Rate and Effective Income Tax Rate

 A reconciliation of the statutory Federal income tax rate and the effective income tax rate for the year ended December 31, 2014 and 2013 follows:

 

     December 31,
2014		     December 31,
2013		  

Statutory federal income tax rate

      35 %      35 % 

Permanent items

      (12 )%      (12 )% 

State income taxes, net of federal taxes

      4 %      4 % 

Change in valuation allowance

      (29 )%      (30 )% 

Tax credits claimed

      1 %      2 % 

Other

      1 %      1 % 
  

 

 

    

 

 

  

Effective income tax rate

      0 %      0 % 
  

 

 

    

 

 

  

Summary of Significant Components of Deferred Tax Assets and Liabilities

Significant components of deferred tax assets and liabilities are as follows (in thousands):

 

     December 31,
2014		      December 31,
2013		  

Deferred tax assets (liabilities)

      

Current deferred tax assets (liabilities)

    $ 187       $ 298   

Deferred revenues

      —           —     
  

 

 

     

 

 

  

Current deferred tax assets

      187         298   

Valuation allowances

      (187 )       (298 ) 
  

 

 

     

 

 

  

Net current deferred tax assets

      —           —     
  

 

 

     

 

 

  

Net operating loss carryforwards

      22,332         19,224   

Stock based compensation

      3,359         2,987   

Research and development tax credit

      1,842         1,627   

Other

      72         51   
  

 

 

     

 

 

  

Non-current deferred tax assets

      27,605         23,889   

Valuation allowances

      (27,582 )       (23,884 ) 
  

 

 

     

 

 

  

Net non-current deferred tax assets

      23         5   

Non-current deferred tax liabilities

      (23 )       (5 ) 
  

 

 

     

 

 

  

Net deferred tax assets

      —           —     
  

 

 

     

 

 

  

Summary of Components of Provision for Income Taxes

The components of the provision for income taxes were as follows:

 

     December 31,
2014		      December 31,
2013		  

Current

    $ —         $ —     

Deferred

      —           —     
  

 

 

     

 

 

  

Total

    $ —         $ —