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v3.25.1

Segment Information - Schedule of Significant Segment Expense Categories (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Research and development expense | $ 813 | $ 2,279
Stock-based compensation expense | 1,015 | 296
Net loss | (3,705) | (5,566)
Significant Segment Expense Category |  |
Segment Reporting Information [Line Items] |  |
General and administrative expense | (1,888) | (3,457)
Stock-based compensation expense | (1,015) | (296)
Other Segment Items |  |
Segment Reporting Information [Line Items] |  |
Other segment items | (180) | 423
Key Measure of Segment Profit or Loss |  |
Segment Reporting Information [Line Items] |  |
Net loss | (3,705) | (5,566)
HSCT-TMA (AK901) Program Expense | Significant Segment Expense Category |  |
Segment Reporting Information [Line Items] |  |
Research and development expense | (62) | (633)
ADC Preclinical Development | Significant Segment Expense Category |  |
Segment Reporting Information [Line Items] |  |
Research and development expense | (17) |
Chemistry, Manufacturing and Control | Significant Segment Expense Category |  |
Segment Reporting Information [Line Items] |  |
Research and development expense | (28) | (711)
Other External Development Expense | Significant Segment Expense Category |  |
Segment Reporting Information [Line Items] |  |
Research and development expense | (98) | (305)
Internal and Other Research and Development Expense | Significant Segment Expense Category |  |
Segment Reporting Information [Line Items] |  |
Research and development expense | $ (417) | $ (587)

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