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RPX License Agreement (Details Narative)
$ in Thousands
3 Months Ended
May 23, 2016
USD ($)
shares
Nov. 23, 2015
USD ($)
Number
shares
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Mandatory redemption payment        
Capital contribution     $ 667  
Long term deferred revenue     3,009   $ 3,245
RPX Corporation [Member] | Series H Convertible Preferred Stock [Member]          
License revenue     307    
Extinguishment preferred stock     31,900    
Fair value of preferred stock     414    
Cash received from related party     4,400    
Capital contribution     31,500    
Short term deferred revenue     1,100    
Long term deferred revenue     $ 3,700    
Deferred revenue amortized service period     5 years    
Patent License Agreement [Member] | RPX Corporation [Member]          
Number of patent | Number   101      
Cash to acquire business   $ 300      
Agreement term   2 years      
License revenue   $ 600 $ 290 $ 31  
Patent License Agreement [Member] | RPX Corporation [Member] | Series I Redeemable Convertible Preferred Stock [Member]          
Mandatory redemption payment   $ 5,000      
Patent License Agreement [Member] | RPX Corporation [Member] | Series H Convertible Preferred Stock [Member]          
Number of shares cancelled | shares   57,076      
Value of shares cancelled   $ 4,765,846      
Percentage of shares cancellation   13.00%      
Second Patent License Agreement [Member] | RPX Corporation [Member]          
License revenue $ 4,355        
Second Patent License Agreement [Member] | RPX Corporation [Member] | Series H Convertible Preferred Stock [Member]          
Number of shares cancelled | shares 381,967        
Value of shares cancelled $ 31,894,244        
Percentage of shares cancellation 100.00%        
Separate Agreement [Member] | RPX Corporation [Member] | VTech Telecommunications Ltd. [Member]          
License revenue $ 20