Business Segment, Geographic, and Concentration Risk Information - Summary of Revenue by Geographical Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Total revenue:
Total consolidated revenue	$ 33,530	$ 31,425	$ 94,188	$ 91,275
United States
Total revenue:
Total consolidated revenue	33,523	31,394	94,167	90,717
Other Foreign Countries
Total revenue:
Total consolidated revenue	$ 7	$ 31	$ 21	$ 558