Product Line, Customer and Geographic Information - Long-lived Assets by Geographic Region (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Geographic And Business Segment Information [Line Items]
Long-Lived Assets	$ 22,300	$ 22,918
UNITED STATES
Geographic And Business Segment Information [Line Items]
Long-Lived Assets	17,070	22,439
Sweden [Member]
Geographic And Business Segment Information [Line Items]
Long-Lived Assets	4,897	0
CHINA [Member]
Geographic And Business Segment Information [Line Items]
Long-Lived Assets	$ 333	$ 479