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Intangible Assets (Details 2) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Nine Months Ended December 31, 2018 $ 1,035  
Year Ended December 31, 2019 1,373  
Year Ended December 31, 2020 732  
Year Ended December 31, 2021 93  
Thereafter 7  
Total 3,240 $ 3,578
7/24/13 - Rockstar Patent Portfolio Acquired [Member]    
Nine Months Ended December 31, 2018 54  
Year Ended December 31, 2019 71  
Year Ended December 31, 2020 71  
Year Ended December 31, 2021 71  
Thereafter 4  
Total 271  
9/10/13 - North South patent portfolio Acquired [Member]    
Nine Months Ended December 31, 2018 17  
Year Ended December 31, 2019 22  
Year Ended December 31, 2020 22  
Year Ended December 31, 2021 22  
Thereafter 3  
Total 86  
12/31/13 - Rockstar Patent Portfolio Acquired [Member]    
Nine Months Ended December 31, 2018 964  
Year Ended December 31, 2019 1,280  
Year Ended December 31, 2020 639  
Year Ended December 31, 2021  
Thereafter  
Total $ 2,883