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Selected Balance Sheet Information | 6 Months Ended
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Jun. 30, 2025
Selected Balance Sheet Information |
Selected Balance Sheet Information | 7. Selected Balance Sheet Information ​ Prepaid expenses and other current assets (in thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2025 |  | 2024
Prepaid manufacturing expenses | ​ | $ | 240 | ​ | $ | 375
Prepaid insurance | ​ | ​ | 208 | ​ | ​ | 374
Prepaid consulting, subscriptions and other expenses | ​ | ​ | 248 | ​ | ​ | 235
VAT receivable | ​ | ​ | 157 | ​ | ​ | 95
Prepaid clinical research organizations | ​ | ​ | 48 | ​ | ​ | 365
​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 901 | ​ | $ | 1,444
​ Prepaid clinical research organizations (CROs) expense is classified as a current asset. The Company makes payments to the CROs based on agreed upon terms that include payments in advance of study services. ​ Property and equipment, net (in thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, | ​ | December 31,
​ |  | 2025 |  | 2024
Computers and office equipment | ​ | $ | 735 | ​ | $ | 708
Other property, plant and equipment | ​ | ​ | 442 | ​ | ​ | 392
Leasehold improvements | ​ |  | 94 | ​ |  | 94
Software | ​ |  | 11 | ​ |  | 11
​ | ​ |  | 1,282 | ​ |  | 1,205
Less: accumulated depreciation and amortization | ​ |  | (1,024) | ​ |  | (935)
​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 258 | ​ | $ | 270
​ Accrued expenses (in thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, | ​ | December 31,
​ |  | 2025 |  | 2024
Milestone due to Grifols | ​ | $ | 5,986 | ​ | $ | —
Accrued clinical consulting services | ​ | ​ | 2,540 | ​ | ​ | 2,390
Accrued manufacturing costs | ​ |  | 275 | ​ |  | 772
Accrued vendor payments | ​ | ​ | 216 | ​ | ​ | 206
​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 9,017 | ​ | $ | 3,368
​ Accrued employee benefits (in thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, | ​ | December 31,
​ |  | 2025 |  | 2024
Accrued bonus expense | ​ | $ | 448 | ​ | $ | 870
Accrued compensation expense | ​ | ​ | 201 | ​ | ​ | 187
Accrued vacation expense | ​ |  | 110 | ​ |  | 87
​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 759 | ​ | $ | 1,144
​

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/210/tableOfContent + Details
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