Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Narrative (Details)

v3.19.1
COMMITMENTS AND CONTINGENCIES - Narrative (Details)
$ in Thousands
3 Months Ended
Aug. 24, 2018
USD ($)
Aug. 24, 2017
USD ($)
patent
Apr. 21, 2017
USD ($)
installment
Nov. 21, 2013
USD ($)
Mar. 31, 2019
USD ($)
installment
lease
Mar. 31, 2018
USD ($)
Jan. 01, 2019
USD ($)
Jul. 19, 2018
Schedule of Investments [Line Items]                
Annual rent expense         $ 700      
Percentage increase in annual rent payment               3.50%
Number of sub-leases | lease         2      
Operating lease payments         $ 110 $ 0    
Right of use assets         2,603      
Operating lease liabilities         $ 2,683      
Weighted average remaining lease term         4 years 3 months      
Weighted average discount rate         11.00%      
Avira, Inc.                
Schedule of Investments [Line Items]                
Sale of patent in license agreement     $ 3,900   $ 1,500      
Number of quarterly installments | installment     12   5      
Installment amount payable     $ 300          
Payable period of agreement     3 years          
Venture Capital Funds                
Schedule of Investments [Line Items]                
Capital commitment       $ 5,000 $ 1,800      
Percentage of limited partnership interest (less than)       10.00%        
Patents | Finjan Blue                
Schedule of Investments [Line Items]                
Number of assets transferred | patent   41            
Patents acquired   $ 8,500            
Payments made $ 1,000 2,000            
Cash payable over subsequent four years   $ 6,500     5,500      
Useful life of intangible asset   4 years            
Patents           7,000    
Adjustment, present value           1,400    
Accretion expense         100 400    
Amortization of intangible assets         $ 400 $ 300    
Accounting Standards Update 2016-02                
Schedule of Investments [Line Items]                
Right of use assets             $ 2,700  
Operating lease liabilities             $ 2,800