XML 41 R30.htm IDEA: XBRL DOCUMENT v3.19.2
Marketable Securities (Tables)
 6 Months Ended
Jun. 30, 2019
Investments, Debt and Equity Securities [Abstract]  
Schedule for Available-for-Sale Securities
The following is a summary of available-for-sale securities as of June 30, 2019 (in thousands):
 
Amortized Cost
 
Gross Unrealized Gain
 
Gross Unrealized (Losses)
 
Estimated Fair Value
Corporate debt securities
$
43,852

 
$
191

 
$
(17
)
 
$
44,026

Tax-exempt municipal securities
15,272

 
129

 
(2
)
 
15,399

Variable rate demand notes
5,600

 
—

 
—

 
5,600

Total
$
64,724

 
$
320

 
$
(19
)
 
$
65,025


The following is a summary of available-for-sale securities as of December 31, 2018 (in thousands):
 
Amortized Cost
 
Gross Unrealized Gain
 
Gross Unrealized (Losses)
 
Estimated Fair Value
Corporate debt securities
$
48,202

 
$
12

 
$
(284
)
 
$
47,930

Tax-exempt municipal securities
22,858

 
45

 
(34
)
 
22,869

Variable rate demand notes
4,000

 
—

 
—

 
4,000

Total
$
75,060

 
$
57

 
$
(318
)
 
$
74,799
Schedule of Maturities of Marketable Securities
The following table summarizes the maturities of the Company’s marketable securities as of December 31, 2018 and June 30, 2019 (in thousands):
 
December 31, 2018
 
June 30, 2019
Due within one year
$
37,121

 
$
39,288

Due after one year through five years
37,678

 
25,737

Total
$
74,799

 
$
65,025