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COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - IBM Lawsuit
$ in Millions
3 Months Ended 6 Months Ended
Jul. 27, 2018
USD ($)
Sep. 06, 2017
May 18, 2017
May 09, 2016
Jun. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Loss Contingencies [Line Items]            
Provision for loss contingency         $ 75.0 $ 75.0
Number of patents allegedly infringed upon   1 2 1    
Subsequent Event            
Loss Contingencies [Line Items]            
Awarded damages $ 82.5          
Unexpired patents infringed upon 2