| Cost And Estimated Fair Value Of Investments |
|
|
|
Cost
|
|
|
Gross
unrealized
gain
|
|
|
Gross
unrealized
loss
|
|
|
Fair
value
|
|
|
September 30, 2017
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commercial Paper
|
|
$
|
693
|
|
|
$
|
0
|
|
|
$
|
0
|
|
|
$
|
693
|
|
|
Treasury Bills
|
|
|
7,396
|
|
|
|
24
|
|
|
|
0
|
|
|
|
7,420
|
|
|
Equity Securities
|
|
|
54
|
|
|
|
0
|
|
|
|
(54
|
)
|
|
|
0
|
|
|
|
|
|
8,143
|
|
|
|
24
|
|
|
|
(54
|
)
|
|
|
8,113
|
|
|
Less Cash Equivalents
|
|
|
693
|
|
|
|
0
|
|
|
|
0
|
|
|
|
693
|
|
|
Total Investments, September 30, 2017
|
|
$
|
7,450
|
|
|
$
|
24
|
|
|
$
|
(54
|
)
|
|
$
|
7,420
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
December 31, 2016
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commercial Paper
|
|
$
|
348
|
|
|
$
|
0
|
|
|
$
|
0
|
|
|
$
|
348
|
|
|
Treasury Bills
|
|
|
7,419
|
|
|
|
8
|
|
|
|
0
|
|
|
|
7,427
|
|
|
Equity Securities
|
|
|
54
|
|
|
|
0
|
|
|
|
(54
|
)
|
|
|
0
|
|
|
|
|
|
7,821
|
|
|
|
8
|
|
|
|
(54
|
)
|
|
|
7,775
|
|
|
Less Cash Equivalents
|
|
|
348
|
|
|
|
0
|
|
|
|
0
|
|
|
|
348
|
|
|
Total Investments, December 31, 2016
|
|
$
|
7,473
|
|
|
$
|
8
|
|
|
$
|
(54
|
)
|
|
$
|
7,427
|
|
|