XML 29 R17.htm IDEA: XBRL DOCUMENT v3.10.0.1
Basis of Presentation and Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2018
Basis of Presentation and Summary of Significant Accounting Policies [Abstract]  
Cash and Available-for-Sale Securities Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value by Significant Investment Category
The following tables show the adjusted cost, gross unrealized gains, gross unrealized losses and fair value of our securities by significant investment category as of June 30, 2018, and December 31, 2017.

  
June 30, 2018
 
  
Adjusted
Cost
  
Unrealized
Gains
  
Unrealized
Losses
  
Fair
Value
  
Cash
and Cash
Equivalents
  
Investments
Available
for Sale
 
Cash
 
$
2,056
  
$
-
  
$
-
  
$
2,056
  
$
2,056
  
$
-
 
                         
Level 1:
                        
Mutual funds
  
1,087
   
-
   
-
   
1,087
   
1,087
   
-
 
U.S. government securities
  
80
   
-
   
-
   
80
   
-
   
80
 
U.S. agency securities
  
1,468
   
1
   
-
   
1,469
   
825
   
644
 
   
2,635
   
1
   
-
   
2,636
   
1,912
   
724
 
Total
 
$
4,691
  
$
1
  
$
-
  
$
4,692
  
$
3,968
  
$
724
 
 
  
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