Shareholders' Equity - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income Loss [Line Items]
Total Accumulated Other Comprehensive Income (Loss)	$ 5	$ 942
Change	(1,612)	(937)
Total Accumulated Other Comprehensive Income (Loss)	(1,607)	5
Foreign Exchange Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Total Accumulated Other Comprehensive Income (Loss)	54	941
Change	(1,621)	(887)
Total Accumulated Other Comprehensive Income (Loss)	(1,567)	54
Unrealized Gain (Loss) on ST Investments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Total Accumulated Other Comprehensive Income (Loss)	(49)	1
Change	9	(50)
Total Accumulated Other Comprehensive Income (Loss)	$ (40)	$ (49)