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Revenue - Schedule of Disaggregates of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Revenue $ 1,209 $ 1,096
PG [Member]    
Revenue 886 898
CP [Member]    
Revenue 323 198
HW [Member]    
Revenue 567 554
HW [Member] | PG [Member]    
Revenue 293 375
HW [Member] | CP [Member]    
Revenue 274 179
Monitoring [Member]    
Revenue 642 542
Monitoring [Member] | PG [Member]    
Revenue 593 524
Monitoring [Member] | CP [Member]    
Revenue $ 49 $ 18