Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2021

Revenue Recognition [Abstract]

Disaggregation of Revenue

	Three months ended March 31, 2021
	Services Revenues		Products Revenue		Total Revenue
Timing of revenue recognition:
Products and services transferred over time	$	2,025,000	$	-	$	2,025,000
Products and services transferred at a point in time		3,361,000		-		3,361,000
Total	$	5,386,000	$	-	$	5,386,000

	Three months ended March 31, 2020
	Services Revenues		Products Revenue		Total Revenue
Timing of revenue recognition:
Products and services transferred over time	$	3,332,000	$	-	$	3,332,000
Products and services transferred at a point in time		1,068,000		246,000		1,314,000
Total	$	4,400,000	$	246,000	$	4,646,000

Schedule of Changes in Deferred Revenue

Balance at December 31, 2020	$	180,000
Reclassification of beginning deferred revenue to revenue, as a result of performance obligations satisfied		( 132,000	)
Cash received in advance and not recognized as revenue		652,000
Balance at March 31, 2021	$	700,000