Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands		Mar. 31, 2025	Dec. 31, 2024
Accounts Payable and Accrued Liabilities, Current [Abstract]
Withholding individual income tax on Employee Stock Options	[1]	$ 4,304
Accrued payroll and welfare		4,234	$ 4,765
Payable to PPE & intangible asset suppliers		3,260	1,219
Payable to selling expense suppliers		2,542	900
Accrued expenses - general and administrative		1,076	1,005
Accrued sales discount		699	908
Accrued expenses - research and development		528	57
Accrued professional services		227	667
Deferred government grants		95	95
Employee reimbursement		3	737
Other accrued liabilities		271	262
Accrued expenses and other current liabilities		$ 17,239	$ 10,615

[1] This amount represents individual income tax withheld on employee stock option exercises, payable to the tax authorities on behalf of employees.