XML 49 R29.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fair Value of Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2018
Fair Value of Financial Instruments [Abstract]  
Fair Value of Financial Instruments Measured on Recurring Basis
The following table sets forth the Company’s financial instruments that were measured at fair value on a recurring basis by level within the fair value hierarchy:

  
Fair Value Measurements as of
June 30, 2018 Using:
 
  
Level 1
  
Level 2
  
Level 3
  
Total
 
Assets:
            
Money market mutual funds (included in cash and cash equivalents)
 
$
42,841
  
$
-
  
$
-
  
$
42,841
 
                 
Government agency securities
  
-
   
4,978
   
-
   
4,978
 
United States Treasury securities
  
113,940
   
-
   
-
   
113,940
 
Investments
  
113,940
   
4,978
   
-
   
118,918
 
                 
  
$
156,781
  
$
4,978
  
$
-
  
$
161,759