LITIGATION, CLAIMS AND ASSESSMENTS - Additional Information (Details)	Sep. 21, 2016 USD ($)	Mar. 11, 2016 patent inter_parts_review	Feb. 26, 2016 patent inter_parts_review	Jan. 14, 2016 patent inter_parts_review	Dec. 17, 2015 patent inter_parts_review	Dec. 10, 2015 patent	Sep. 10, 2015 inter_parts_review	Aug. 20, 2015 inter_parts_review	Aug. 04, 2015 USD ($)	Sep. 07, 2016 USD ($)
Blue Coat Systems, Inc
Loss Contingencies [Line Items]
Damages awarded | $									$ 39,500,000
Number of IPRs | inter_parts_review					5
Number of patents asserted | patent					7
Sophos Inc
Loss Contingencies [Line Items]
Damages awarded | $	$ 15,000,000
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
Blue Coat Systems, Inc | Blue Coat Systems, Inc
Loss Contingencies [Line Items]
Bond amount | $										$ 40,086,172.78