Leases - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2025 USD ($) m²	Mar. 31, 2024 USD ($)
Lessee Lease Description [Line Items]
Short-term lease expenses	$ 16,000	$ 18,000
Right-of-use assets	1,600,000
Operating lease, liability	1,585,000
Operating lease expense	200,000	$ 100,000
Security deposits	$ 300,000
Combined square meter area for manufacturing facilities under lease | m²	66,559
Land use rights, net assets	$ 1,400,000
Beijing [Member]
Lessee Lease Description [Line Items]
Square meter area for office space under lease | m²	2,130
Lease expiration month and year	2027-06
Zhengzhou [Member]
Lessee Lease Description [Line Items]
Square meter area for laboratory center under lease | m²	180
Lease expiration month and year	2026-08
Shanghai [Member]
Lessee Lease Description [Line Items]
Square meter area for laboratory center under lease | m²	224
Lease expiration month and year	2026-12
Nanjing [Member]
Lessee Lease Description [Line Items]
Square meter area for laboratory center under lease | m²	70
California [Member]
Lessee Lease Description [Line Items]
Lease expiration month and year	2027-03