Quarterly report pursuant to Section 13 or 15(d)

Investments (Tables)

v3.7.0.1
Investments (Tables)
 3 Months Ended
Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]  
Schedule of amortized cost and estimated fair values of available-for-sale securities by balance sheet classification
The amortized cost and estimated fair values of available-for-sale securities by balance sheet classification are as follows (dollar amounts in thousands):
 
As of March 31, 2017
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
U.S. government securities funds
$
1,799

 
$
—

 
$
(23
)
 
$
1,776

Total short-term investment securities
$
1,799

 
$
—

 
$
(23
)
 
$
1,776

 
As of December 31, 2016
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
U.S. government securities funds
$
1,799

 
$
—

 
$
(23
)
 
$
1,776

Total short-term investment securities
$
1,799

 
$
—

 
$
(23
)
 
$
1,776