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Revenue - Schedule of Disaggregates of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Revenue $ 1,386 $ 1,337 $ 4,090 $ 3,776
PG [Member]        
Revenue 1,090 931 3,143 2,698
CP [Member]        
Revenue 296 406 947 1,078
Hardware [Member]        
Revenue 539 646 1,673 1,786
Hardware [Member] | PG [Member]        
Revenue 305 292 906 860
Hardware [Member] | CP [Member]        
Revenue 234 354 767 926
Monitoring [Member]        
Revenue 847 691 2,417 1,990
Monitoring [Member] | PG [Member]        
Revenue 785 639 2,237 1,838
Monitoring [Member] | CP [Member]        
Revenue $ 62 $ 52 $ 180 $ 152