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Cash, Cash Equivalents, and Short-Term Investments
 12 Months Ended
Dec. 31, 2016
Cash and Cash Equivalents [Abstract]  
Cash, Cash Equivalents, and Short-Term Investments

3.    Cash, Cash Equivalents, and Short-Term Investments

Cash, cash equivalents and short-term investments consisted of the following (in thousands):

 

     December 31, 2016  
     Amortized
Cost		      Unrealized
Gain		      Unrealized
(Loss)		      Estimated
Fair Value		  

Cash

    $ 671      $ —      $ —      $ 671  

Money market funds

      2,864        —        —        2,864  

U.S. government treasury bills

      3,008        —        —        3,008  

Corporate bonds and commercial paper

      5,504        —        —        5,504  
  

 

 

     

 

 

     

 

 

     

 

 

  
   $ 12,047      $ —      $ —      $ 12,047  
  

 

 

     

 

 

     

 

 

     

 

 

  

Reported as:

            

Cash and cash equivalents

             $ 3,535  

Short-term investments

               8,512  
           

 

 

  

Total cash, cash equivalents and short-term investments

             $ 12,047  
           

 

 

  

As of December 31, 2016, the Company’s cash equivalents and short-term investments had a weighted-average time to maturity of less than one year, and the Company has the ability to hold its investments through their maturity dates. There have been no significant realized gains or losses on investments for the period presented.