Segment Information (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule of Product Revenue from Customer by Geographic Region

Product revenue from customers is designated based on the geographic region to which the product is delivered. Revenue by geographic region was as follows (in thousands):

	Three Months Ended March 31,
	2022		2021
China	$	11,257	$	10,159
Taiwan		2,244		2,414
South Korea		1,470		1,642
Japan		638		172
Other		419		169
Total revenue	$	16,028	$	14,556

Schedule of Revenue by Principal Products Lines

Revenue by principal product lines was as follows (in thousands):

	Three Months Ended March 31,
	2022		2021
Automotive	$	9,537	$	6,305
Security surveillance		6,491		8,251
Total revenue	$	16,028	$	14,556

Schedule of Net Long-lived Assets by Geographic Region

Long-lived assets by geographic region were as follows (in thousands):

	March 31,		December 31,
	2022		2021
Taiwan	$	464	$	415
China	$	189	$	207
United States		72		79
South Korea		6		7
Japan		4		5
Total property and equipment - net	$	735	$	713