Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2018

Revenue Recognition Tables Abstract

Disaggregation of Revenue

	Three months ended September 30, 2018						Nine months ended September 30, 2018
	Services Revenues		Products Revenue		Total Revenue		Services Revenues		Products Revenue		Total Revenue
Timing of revenue recognition:
Products and services transferred over time	$	8,016,000		—	$	8,016,000	$	21,883,000		—	$	21,883,000
Products and services transferred at a point in time	$	1,053,000	$	386,000	$	1,439,000	$	2,080,000	$	1,156,000	$	3,236,000
Total	$	9,069,000	$	386,000	$	9,455,000	$	23,963,000	$	1,156,000	$	25,119,000

Schedule of Changes in Deferred Revenue

Balance at December 31, 2017	$	372,000
Reclassification of beginning deferred revenue to revenue, as a result of performance obligations satisfied		(122,000	)
Cash received in advance and not recognized as revenue		503,000
Cumulative catch-up from a change in the timeframe for recognition of revenue arising from deferred revenue		—
Balance at September 30, 2018	$	753,000