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v3.25.2

Description of Business - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 01, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Long Term Loan Amount | $ 100,000,000 |  |  |  |  |  |  |
Duration of long term loan | 5 years |  |  |  |  |  |  |
Net Income (Loss) |  | $ (18,541,000) | $ (25,783,000) | $ (34,454,000) | $ (39,944,000) | $ (44,324,000) | $ (74,398,000) |
Accumulated deficit |  | (1,134,047,000) |  |  |  | (1,134,047,000) |  | $ (1,089,723,000)
Restricted cash |  | 3,329,000 |  |  |  | 3,329,000 |  | $ 3,329,000
Cash outflow from operating activities |  |  |  |  |  | 30,500,000 |  |
Proceeds from Operating Activities, Total |  |  |  |  |  |  | $ 79,200,000 |
Cash, cash equivalents, restricted cash and short-term investments |  | $ 187,400,000 |  |  |  | $ 187,400,000 |  |
Maximum |  |  |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Additional Long Term Loan Amount | $ 25,000,000 |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Shares Conversion |  |  | 14,046,000 |  |  | 14,046,000 |  |
Series A Convertible Preferred Stock |  |  |  |  |  |  |  |
Description Of Business [Line Items] |  |  |  |  |  |  |  |
Stock issued during the period |  |  |  |  |  | 863,000 |  |
Purchase price |  | $ 200 |  |  |  | $ 200 |  |
Gross proceeds of private placement |  |  |  |  |  | $ 172,700 |  |
Number of shares |  |  |  |  |  | 842,000 |  |

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