Quarterly report pursuant to Section 13 or 15(d)

LICENSE, SETTLEMENT AND RELEASE AGREEMENT (Details)

v3.8.0.1
LICENSE, SETTLEMENT AND RELEASE AGREEMENT (Details) - Licensing Agreements - USD ($)
$ in Thousands
9 Months Ended
Apr. 21, 2017
Mar. 31, 2017
Mar. 24, 2017
Mar. 02, 2017
Dec. 28, 2016
Jun. 30, 2016
Jun. 06, 2016
Jun. 03, 2016
Sep. 30, 2017
Mar. 31, 2019
Jan. 31, 2019
Mar. 31, 2018
Jan. 31, 2018
Jan. 03, 2018
EU Licensee                            
Finite-Lived Intangible Assets [Line Items]                            
Sale of patent in license agreement $ 4,900                          
Receivable related to license agreement $ 2,300                          
Cash received from license agreement                 $ 2,300          
EU Licensee | Forecast                            
Finite-Lived Intangible Assets [Line Items]                            
Receivable related to license agreement                     $ 1,300   $ 1,300  
Sophos Group                            
Finite-Lived Intangible Assets [Line Items]                            
Receivable related to license agreement                 2,500          
Cash received from license agreement   $ 15,000                        
License revenue   $ 15,000                        
Sophos Group | Forecast                            
Finite-Lived Intangible Assets [Line Items]                            
Receivable related to license agreement                   $ 1,250   $ 1,250    
Avast Software                            
Finite-Lived Intangible Assets [Line Items]                            
Cash received from license agreement     $ 7,745                      
Veracode                            
Finite-Lived Intangible Assets [Line Items]                            
Cash received from license agreement       $ 2,000                    
Proofpoint and Armorize Technologies                            
Finite-Lived Intangible Assets [Line Items]                            
Sale of patent in license agreement               $ 10,900            
Receivable related to license agreement                 $ 3,300          
Cash received from license agreement         $ 3,300   $ 4,300              
License revenue         $ 3,300 $ 4,300                
License fee receivable               $ 10,900            
Proofpoint and Armorize Technologies | Forecast                            
Finite-Lived Intangible Assets [Line Items]                            
Receivable related to license agreement                           $ 3,300