LITIGATION, CLAIMS AND ASSESSMENTS - Additional Information (Details) $ in Millions	Mar. 11, 2016 inter_parts_review patent	Feb. 26, 2016 inter_parts_review patent	Jan. 14, 2016 inter_parts_review patent	Dec. 17, 2015 inter_parts_review patent	Dec. 10, 2015 patent	Sep. 10, 2015 inter_parts_review	Aug. 20, 2015 inter_parts_review	Aug. 04, 2015 USD ($)
Blue Coat Systems, Inc
Loss Contingencies [Line Items]
Damages awarded | $								$ 39.5
Number of IPRs | inter_parts_review				5
Number of patents asserted | patent				7
Symantec Corp
Loss Contingencies [Line Items]
Number of IPRs | inter_parts_review						11	8
Symantec Corp | Denied
Loss Contingencies [Line Items]
Number of IPRs | inter_parts_review	2	2	6
Number of patents asserted | patent	10	8	5
Palo Alto Networks, Inc
Loss Contingencies [Line Items]
Number of patents asserted | patent					10