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INTANGIBLES AND OTHER ASSETS (Tables)
 9 Months Ended
Sep. 30, 2017
Intangibles And Other Assets [Abstract]  
Schedule of intangibles and other assets
 
 
September 30, 2017
 
December 31, 2016
 
 
(In thousands)
Purchased patents and other purchased intangible assets
 
$
4,605

 
$
4,605

Less: Accumulated amortization of purchased patents and other purchased intangibles
 
(4,605
)
 
(4,605
)
Purchased patents and other purchased intangible assets, net
 
—

 
—

Other assets
 
351

 
365

Intangibles and other assets, net
 
$
351

 
$
365