Quarterly report pursuant to Section 13 or 15(d)

LICENSE, SETTLEMENT AND RELEASE AGREEMENT (Details)

v3.19.3
LICENSE, SETTLEMENT AND RELEASE AGREEMENT (Details)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Oct. 03, 2019
USD ($)
Sep. 30, 2019
Apr. 30, 2019
USD ($)
installment_payment
Mar. 28, 2019
USD ($)
Jan. 28, 2019
USD ($)
Mar. 29, 2018
USD ($)
Feb. 28, 2018
USD ($)
Feb. 01, 2018
USD ($)
May 31, 2017
USD ($)
Apr. 21, 2017
USD ($)
Mar. 31, 2017
USD ($)
Mar. 30, 2017
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Jun. 30, 2017
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Jan. 31, 2019
USD ($)
Finite-Lived Intangible Assets [Line Items]                                      
License revenue                         $ 5,900 $ 0     $ 13,150 $ 82,300  
Licensing Agreements | Mimecast                                      
Finite-Lived Intangible Assets [Line Items]                                      
Payment period   5 days                                  
Licensing Agreements | Mimecast | Subsequent Event                                      
Finite-Lived Intangible Assets [Line Items]                                      
Settlement, amount awarded from other party $ 5,900                                    
Licensing Agreements | Zscaler                                      
Finite-Lived Intangible Assets [Line Items]                                      
Settlement, amount awarded from other party     $ 7,250                                
Payment period     5 days                                
Percentage of gross revenues     8.00%                                
Number of quarterly installments | installment_payment     4                                
Licensing Agreements | Symantec Corp                                      
Finite-Lived Intangible Assets [Line Items]                                      
Settlement, amount awarded from other party             $ 65,000                        
Payment period             20 days                        
Payable period of agreement             4 years                        
Licensing Agreements | EU Licensee                                      
Finite-Lived Intangible Assets [Line Items]                                      
Settlement, amount awarded from other party                   $ 4,900                  
Payment period                   10 days                  
Accounts receivable                                     $ 1,300
Licensing Agreements | Sophos Group                                      
Finite-Lived Intangible Assets [Line Items]                                      
Settlement, amount awarded from other party                       $ 2,500              
Cash received from license agreement                     $ 15,000                
Maximum | Licensing Agreements | Symantec Corp                                      
Finite-Lived Intangible Assets [Line Items]                                      
Additional license fees             $ 45,000                        
License | Licensing Agreements | Symantec Corp                                      
Finite-Lived Intangible Assets [Line Items]                                      
License revenue                             $ 65,000        
License | Licensing Agreements | EU Licensee                                      
Finite-Lived Intangible Assets [Line Items]                                      
License revenue         $ 1,300     $ 1,300 $ 2,300             $ 2,300      
License | Licensing Agreements | Sophos Group                                      
Finite-Lived Intangible Assets [Line Items]                                      
License revenue       $ 1,250   $ 1,250         $ 15,000