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Revenue Recognition (Tables)
 12 Months Ended
Dec. 31, 2019
Revenue Recognition Tables Abstract  
Disaggregation of Revenue
    Year ended December 31, 2019  
    Services Revenues     Products Revenue     Total Revenue  
Timing of revenue recognition:                  
Products and services transferred over time   $ 15,172,000     $ -     $ 15,172,000  
Products and services transferred at a point in time     5,057,000       1,725,000       6,782,000  
Total   $ 20,229,000     $ 1,725,000     $ 21,954,000  

 

    Year ended December 31, 2018  
    Services Revenues     Products Revenue     Total Revenue  
Timing of revenue recognition:                  
Products and services transferred over time   $ 28,598,000     $ -     $ 28,598,000  
Products and services transferred at a point in time     3,025,000       1,613,000       4,638,000  
Total   $ 31,623,000     $ 1,613,000     $ 33,236,000  
Schedule of Changes in Deferred Revenue
Balance at December 31, 2018   $ 302,000  
Reclassification of beginning deferred revenue to revenue, as a result of performance obligations satisfied     (302,000 )
Cash received in advance and not recognized as revenue     140,000  
Balance at December 31, 2019   $ 140,000