Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Narrative (Details)

v3.19.3
COMMITMENTS AND CONTINGENCIES - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 09, 2019
USD ($)
Aug. 24, 2018
USD ($)
Aug. 24, 2017
USD ($)
patent
Apr. 21, 2017
USD ($)
installment
Nov. 21, 2013
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
lease
installment
Sep. 30, 2018
USD ($)
Sep. 16, 2019
USD ($)
Apr. 01, 2019
USD ($)
Jan. 01, 2019
USD ($)
Jul. 19, 2018
Mar. 31, 2018
USD ($)
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               $ 600            
Right of use assets           $ 2,356   2,356            
Operating lease liabilities           $ 2,437   $ 2,437            
Weighted average remaining lease term           3 years 9 months   3 years 9 months            
Weighted average discount rate           11.00%   11.00%            
Payments made               $ 0 $ 1,000          
Avira, Inc.                            
Schedule of Investments [Line Items]                            
Sale of patent in license agreement       $ 3,900       $ 1,000            
Number of quarterly installments | installment       12       3            
Installment amount payable       $ 300                    
Payable period of agreement       3 years                    
Venture Capital Funds                            
Schedule of Investments [Line Items]                            
Capital commitment         $ 5,000 $ 1,100   $ 1,100            
Percentage of limited partnership interest (less than)         10.00%                  
Cash call                   $ 200 $ 500      
Patents | Finjan Blue                            
Schedule of Investments [Line Items]                            
Number of assets transferred | patent     41                      
Patents acquired     $ 8,500                      
Payments made $ 1,500 $ 1,000 2,000                      
Cash payable over subsequent four years     $ 6,500     4,000   4,000            
Useful life of intangible asset     4 years                      
Patents                           $ 7,000
Adjustment, present value                           $ 1,400
Accretion expense           100 $ 100 300 700          
Amortization of intangible assets           $ 500 $ 500 $ 1,500 $ 1,300          
Accounting Standards Update 2016-02                            
Schedule of Investments [Line Items]                            
Right of use assets                       $ 2,700    
Operating lease liabilities                       $ 2,800