Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accrued payroll and welfare	$ 4,914	$ 5,790
Accrued expenses - selling expenses	1,054	44
Supplier reimbursement	1,351	2,247
Accrued expenses - general and administrative	924	1,190
Accrued sales discount	879	903
Accrued expenses - research and development	215	161
Other accrued liabilities	162	75
Deferred government grants	40	40
Employee reimbursement	14	648
Accrued professional services		837
Accrued expenses and other current liabilities	$ 9,553	$ 11,935