Income Taxes - Summary of Deferred Tax Assets Net of Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Valuation Allowance [Line Items]
Net Deferred Tax Assets before valuation allowance	$ 15,258	$ 12,938
Valuation allowance	(15,258)	(12,938)
Net Deferred Tax Assets	0	0
UNITED STATES
Valuation Allowance [Line Items]
Net Deferred Tax Assets before valuation allowance	11,941	12,157
CHINA [Member]
Valuation Allowance [Line Items]
Net Deferred Tax Assets before valuation allowance	1,169	781
Sweden [Member]
Valuation Allowance [Line Items]
Net Deferred Tax Assets before valuation allowance	$ 2,148	$ 0