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, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 46,018	$ 41,404
Long-Lived Assets, Net	5,251	1,360
Country US [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	45,270	40,481
Long-Lived Assets, Net	5,251	1,360
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	648	823
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