Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

v3.10.0.1
COMMITMENTS AND CONTINGENCIES (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 24, 2018
USD ($)
Aug. 24, 2017
USD ($)
patent
Apr. 21, 2017
USD ($)
installment
Nov. 21, 2013
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
installment
Sep. 30, 2017
USD ($)
Sep. 04, 2018
USD ($)
Jul. 19, 2018
Mar. 31, 2018
USD ($)
Feb. 23, 2018
USD ($)
Dec. 31, 2017
USD ($)
Schedule of Investments [Line Items]                          
Annual rent expense             $ 700            
Percentage increase in annual rent payment                   3.50%      
Deferred rent payable         $ 0   0           $ 36
Rent expense         146 $ 198 432 $ 573          
Rental income         102 90 186 267          
Payments made             1,000 2,000          
Patents         26,070   26,070           $ 26,552
Amortization of intangible assets         500 $ 200 1,300 $ 200          
Avira, Inc.                          
Schedule of Investments [Line Items]                          
Sale of patent in license agreement     $ 3,900       $ 2,300            
Number of quarterly installments | installment     12       7            
Installment amount payable     $ 300                    
Payable period of agreement     3 years                    
Venture Capital Funds                          
Schedule of Investments [Line Items]                          
Capital commitment       $ 5,000 1,800   $ 1,800            
Percentage of limited partnership interest (less than)       10.00%                  
Cash call                 $ 400     $ 500  
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   5,500            
Useful life of intangible asset   4 years                      
Patents                     $ 7,000    
Adjustment, present value                     $ 1,400    
Accretion expense         100   700            
Amortization of intangible assets         $ 500   $ 1,300