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v3.25.2

Leases - Additional Information (Detail) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 USD ($) m² | Jun. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) m² | Jun. 30, 2024 USD ($)
Lessee Lease Description [Line Items] |  |  |  |
Short-term lease expenses | $ | $ 32,000 | $ 17,000 | $ 48,000 | $ 35,000
Right-of-use assets | $ | 1,500,000 |  | 1,500,000 |
Operating lease, liability | $ | 1,393,000 |  | 1,393,000 |
Operating lease expense | $ | 200,000 | $ 100,000 | 400,000 | $ 300,000
Security deposits | $ | $ 300,000 |  | $ 300,000 |
Combined square meter area for manufacturing facilities under lease | m² | 66,559 |  | 66,559 |
Land use rights, net assets | $ | $ 1,400,000 |  | $ 1,400,000 |
Beijing [Member] |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |
Square meter area for office space under lease | m² | 2,130 |  | 2,130 |
Square meter area for staff dormitory under lease | m² | 249 |  | 249 |
Lease expiration month and year |  |  | 2027-06 |
Staff dormitory lease expiration month and year |  |  | 2028-03 |
Zhengzhou [Member] |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |
Square meter area for laboratory center under lease | m² | 180 |  | 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 |  | 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 |  | 70 |
California [Member] |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |
Lease expiration month and year |  |  | 2027-03 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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