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Intangible Assets (Details 2) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Six Months Ended December 31, 2017 $ 347  
Year Ended December 31, 2018 1,373  
Year Ended December 31, 2019 1,373  
Year Ended December 31, 2020 731  
Year Ended December 31, 2021 93  
Thereafter 7  
Total 3,924 $ 4,951
7/24/13 - Rockstar Patent Portfolio Acquired [Member]    
Six Months Ended December 31, 2017 18  
Year Ended December 31, 2018 71  
Year Ended December 31, 2019 71  
Year Ended December 31, 2020 71  
Year Ended December 31, 2021 71  
Thereafter 4  
Total 306  
9/10/13 - North South patent portfolio Acquired [Member]    
Six Months Ended December 31, 2017 6  
Year Ended December 31, 2018 22  
Year Ended December 31, 2019 22  
Year Ended December 31, 2020 22  
Year Ended December 31, 2021 22  
Thereafter 3  
Total 97  
12/31/13 - Rockstar Patent Portfolio Acquired [Member]    
Six Months Ended December 31, 2017 323  
Year Ended December 31, 2018 1,280  
Year Ended December 31, 2019 1,280  
Year Ended December 31, 2020 638  
Year Ended December 31, 2021  
Thereafter  
Total $ 3,521