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Revenue Recognition - Schedule of Unamortized Installation Cost and Sales Commissions (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Balance at January 1, 2020 $ 274 $ 424
Incremental costs deferred 143 513
Deferred costs recognized (332) (663)
Balance at September 30, 2020 85 274
Installation Costs [Member]    
Balance at January 1, 2020 187  
Incremental costs deferred 83  
Deferred costs recognized (212)  
Balance at September 30, 2020 58 187
Sales Commissions [Member]    
Balance at January 1, 2020 87  
Incremental costs deferred 60  
Deferred costs recognized (120)  
Balance at September 30, 2020 $ 27 $ 87