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Revenue - Schedule of Disaggregates of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Revenue $ 1,338 $ 1,327
PG [Member]    
Revenue 1,109 996
CP [Member]    
Revenue 229 331
Hardware [Member]    
Revenue 443 561
Hardware [Member] | PG [Member]    
Revenue 277 290
Hardware [Member] | CP [Member]    
Revenue 166 271
Monitoring [Member]    
Revenue 895 766
Monitoring [Member] | PG [Member]    
Revenue 832 706
Monitoring [Member] | CP [Member]    
Revenue $ 63 $ 60