XML 47 R32.htm IDEA: XBRL DOCUMENT v3.19.1
Fair Value Measurement (Tables)
 12 Months Ended
Dec. 31, 2018
Fair Value Measurement [Abstract]  
Cash and Available-for-Sale Securities Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value by Significant Investment Category
The following table shows our cash and available-for-sale securities adjusted cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category recorded as cash and cash equivalents of investments available for sale as of December 31, 2018 and 2017 (in thousands):

  
December 31, 2018
 
  
Adjusted
Cost
  
Unrealized
Gains
  
Unrealized
Losses
  
Fair
Value
  
Cash
and Cash
Equivalents
  
Investments
Available
for Sale
 
Cash
 
$
5,048
  
$
—
  
$
—
  
$
5,048
  
$
5,048
  
$
—
 
Level 1:
                        
Mutual funds
  
1,107
  
—
   
—
   
1,107
   
1,107
   
—
 
U.S. agency securities
  
3,259
  
—
   
—
   
3,259
   
1,456
   
1,803
 
   
4,366
  
—
   
—
   
4,366
   
2,563
   
1,803
 
Total
 
$
9,414
  
$
—
  
$
—
  
$
9,414
  
$
7,611
  
$
1,803
 

  
December 31, 2017
 
  
Adjusted
Cost
  
Unrealized
Gains
  
Unrealized
Losses
  
Fair
Value
  
Cash
and Cash
Equivalents
  
Investments
Available
for Sale
 
Cash
 
$
1,972
  
$
—
  
$
—
  
$
1,972
  
$
1,972
  
$
—
 
Level 1:
                        
Mutual funds
  
616
  
$
—
   
—
   
616
   
616
   
—
 
U.S. agency securities
  
2,001
  
$
—
   
(1
)
  
2,000
   
547
   
1,453
 
   
2,617
  
$
—
   
(1
)
  
2,616
   
1,163
   
1,453
 
Total
 
$
4,589
  
$
—
  
$
(1
)
 
$
4,588
  
$
3,135
  
$
1,453