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Consolidated Balance Sheets and Statements of Operations and Comprehensive Income (Loss) Components (Tables)
 12 Months Ended
Dec. 31, 2013
Consolidated Balance Sheets and Statements of Operations and Comprehensive Income (Loss) Components  
Schedule of prepaid expenses and other current assets and property and equipment

 

 

 
   December 31,  
 
   2013   2012  
 
   (in thousands)
  

Prepaid expenses and other current assets:

              

Inventory

   $ 567   $ 252  

Interest receivable

     382     263  

Prepaid expenses and other assets

     722     847  
           
​ ​ ​ ​ ​ ​ ​ ​

 

   $ 1,671   $ 1,362  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           

Property and equipment:

              

Equipment, furniture and fixtures and leasehold improvements

   $ 3,923   $ 4,135  

Acquired software

     686     651  
           
​ ​ ​ ​ ​ ​ ​ ​

 

     4,609     4,786  

Less: Accumulated depreciation and amortization

     (3,903 )   (3,548 )
           
​ ​ ​ ​ ​ ​ ​ ​

 

   $ 706   $ 1,238  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           
Schedule of accrued expenses and other liabilities
 
   December 31,  
 
   2013   2012  

Accrued expenses and other liabilities:

              

Accrued wages and employee benefits

   $ 818   $ 881  

Employee stock purchase plan withholdings

     286     292  

Professional fees

     61     503  

Other

     744     2,271  
           
​ ​ ​ ​ ​ ​ ​ ​

 

   $ 1,909   $ 3,947  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           
Schedule of other income, net

  •  

 

 
   2013   2012   2011  
 
   (in thousands)
  

Interest income

   $ 174   $ 171   $ 143  

Other income (expense), net

     35     (16 )   63  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

 

   $ 209   $ 155   $ 206  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​