Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments			2
Revenue	$ 2,819	$ 3,788	$ 5,571	$ 6,767
Gross profit	1,995	2,961	4,131	5,234
Amortization of intangible assets	204	195	404	382
Intangible assets	2,996	2,957	2,996	2,957
Intersection [Member]
Segment Reporting Information [Line Items]
Revenue	1,456	2,637	3,438	4,529
Gross profit	1,305	2,437	3,074	4,161
Amortization of intangible assets	105	97	210	190
Intangible assets	1,782	1,364	1,782	1,364
Highway [Member]
Segment Reporting Information [Line Items]
Revenue	1,363	1,151	2,133	2,238
Gross profit	690	524	1,057	1,073
Amortization of intangible assets	99	98	194	192
Intangible assets	$ 1,214	$ 1,593	$ 1,214	$ 1,593