Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2020

Revenue Recognition [Abstract]

Disaggregation of revenue

	Year ended December 31, 2020
	Services Revenues		Products Revenue		Total Revenue
Timing of revenue recognition:
Products and services transferred over time	$	10,702,000	$	-	$	10,702,000
Products and services transferred at a point in time		6,389,000		578,000		6,967,000
Total	$	17,091,000	$	578,000	$	17,669,000

	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

Deferred revenue

Balance at December 31, 2019	$	140,000
Reclassification of beginning deferred revenue to revenue, as a result of performance obligations satisfied		(140,000	)
Cash received in advance and not recognized as revenue		180,000
Balance at December 31, 2020	$	180,000