Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

Revenue disaggregated by revenue source is as follows (in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
Revenue:
Products	$	9,494	$	12,076	$	29,017	$	39,053
Services	685		663		2,097		1,982
	$	10,179	$	12,739	$	31,114	$	41,035