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INTANGIBLES AND OTHER ASSETS - SCHEDULE OF INTANGIBLES AND OTHER ASSETS (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]          
Other assets $ 363   $ 363   $ 365
Intangibles and other assets, net 363   $ 363   365
Intangible asset - useful life     10 years    
Amortization of intangibles 0 $ 2 $ 0 $ 5  
Purchased patents and other purchased intangibles          
Finite-Lived Intangible Assets [Line Items]          
Purchased patents and other purchased intangible assets 4,605   4,605   4,605
Less: Accumulated amortization of purchased patents and other purchased intangibles (4,605)   (4,605)   (4,605)
Purchased patents and other purchased intangible assets, net $ 0   $ 0   $ 0