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MARKETABLE SECURITIES (Tables)
3 Months Ended
Mar. 31, 2018
Marketable Securities [Abstract]  
Schedule of Fair Value of Marketable Securities
At March 31, 2018 and December 31, 2017, the fair value of marketable securities are as follows:
 
March 31, 2018
 
December 31, 2017
 
(In thousands)
Available-for-sale marketable debt securities
$
4,990

 
$
4,995

Equity security with a readily determinable fair value
640

 

     Total marketable securities
$
5,630

 
$
4,995

Schedule of Current Available-for-sale Marketable Securities
At December 31, 2017, current available-for-sale marketable debt securities are as follows:
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair Value
 
(In thousands)
Commercial paper
$
4,995

 
$

 
$

 
$
4,995

Total available-for-sale marketable debt securities
$
4,995

 
$

 
$

 
$
4,995

At March 31, 2018, current available-for-sale marketable debt securities are as follows:
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair Value
 
(In thousands)
 Commercial paper
$
4,990

 
$

 
$

 
$
4,990

     Total available-for-sale marketable debt securities
$
4,990

 
$

 
$

 
$
4,990

Schedule of Proceeds from Maturities and Sales of Current Available-for-sale Marketable Securities
The following table presents the proceeds from maturities and sales of available-for-sale marketable debt securities:
 
March 31,
 
2018
 
2017
 
(In thousands)
Proceeds from maturities and sales of available-for-sale marketable debt securities
$
5,000

 
$
75,350