Property, Plant and Equipment - Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 3,346	$ 3,632
Accumulated depreciation and amortization	(1,921)	(1,616)
Property, plant and equipment, net	$ 1,425	2,016
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Life	5 years
Property, plant and equipment	$ 1,633	1,699
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Life	lesser of useful life or lease term
Property, plant and equipment	$ 869	1,026
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 617	617
Software | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Life	3 years
Software | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Life	5 years
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 227	$ 290
Computer equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Life	3 years
Computer equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Useful Life	5 years