Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2019

Revenue Recognition Tables Abstract

Disaggregation of Revenue

	Three months ended March 31, 2019
	Services Revenues		Products Revenue		Total Revenue
Timing of revenue recognition:
Products and services transferred over time	$	3,555,000	$	-	$	3,555,000
Products and services transferred at a point in time		1,084,000		501,000		1,585,000
Total	$	4,639,000	$	501,000	$	5,140,000

Schedule of Changes in Deferred Revenue

	Three months ended March 31, 2018
	Services Revenues		Products Revenue		Total Revenue
Timing of revenue recognition:
Products and services transferred over time	$	7,026,000	$	-	$	7,026,000
Products and services transferred at a point in time		-		393,000		393,000
Total	$	7,026,000	$	393,000	$	7,419,000