Segment and Geographic Information - Summary of Revenues Based on Location of Customers (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	$ 6,780	$ 8,034
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	6,003	761
Argentina
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	26	6,681
India
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	7	100
Africa
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues		106
Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	503	354
Spain
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	225
United Kingdom
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues	$ 16
Austria
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenues		$ 32