Segment and Geographic Area Information - Summary of Company's Revenues and Long-Lived Assets, Net, by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 41,404	$ 36,939
Long-Lived Assets, Net	1,360	476
Country US [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	40,481	35,988
Long-Lived Assets, Net	1,360	476
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	823	851
Long-Lived Assets, Net	0	0
UNITED KINGDOM [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	100	100
Long-Lived Assets, Net	$ 0	$ 0