Segment Information - Schedule of Revenue by Principal Product Lines (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Entity Wide Information Revenue From External Customer [Line Items]
Revenue	$ 6,214	$ 9,613	$ 20,823	$ 21,809
Security Surveillance
Entity Wide Information Revenue From External Customer [Line Items]
Revenue	1,944	6,551	9,407	14,363
Automotive
Entity Wide Information Revenue From External Customer [Line Items]
Revenue	$ 4,270	$ 3,062	$ 11,416	$ 7,446