Segment Information (Long-Lived Assets by Geographic Region) (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 21,346	$ 22,438
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	13,774	14,402
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	6,478	6,682
Rest of the World
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1,094	$ 1,354