Segment Information (Tables)

3 Months Ended

Mar. 31, 2021

Segment Information [Abstract]

Schedule of financial information by reportable segment

The following table sets forth selected unaudited financial information for each of our reportable segments (in thousands):

	Three Months Ended March 31,
	Intersection				Highway				Total
	2021		2020		2021		2020		2021		2020
Revenue	$	1,892	$	2,250	$	1,087	$	909	$	2,979	$	3,159
Gross profit		1,724		2,069		549		467		2,273		2,536
Amortization of intangible assets		92		92		95		82		187		174
Intangible assets		1,407		1,651		1,690		2,071		3,097		3,722