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MARKETABLE SECURITIES
 9 Months Ended
Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]  
MARKETABLE SECURITIES MARKETABLE SECURITIES
 
September 30, 2019
(in thousands)
Amortized Cost
 
Unrealized Gains
 
Unrealized Losses
 
Fair Value
Municipal bonds
$
10,680

 
$
69

 
$
—

 
$
10,749

Corporate bonds
9,611

 
105

 
—

 
9,716

 
$
20,291

 
$
174

 
$
—

 
$
20,465

 
December 31, 2018
(in thousands)
Amortized Cost
 
Unrealized Gains
 
Unrealized Losses
 
Fair Value
Municipal bonds
$
44,802

 
$
13

 
$
(110
)
 
$
44,705

Corporate bonds
48,499

 
23

 
(226
)
 
48,296

 
$
93,301

 
$
36

 
$
(336
)
 
$
93,001


As of September 30, 2019, maturities of marketable securities ranged from May 2020 to August 2022, with a weighted-average remaining maturity of approximately 1.5 years.