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Supplemental Balance Sheet Information | 6 Months Ended
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Jun. 30, 2023
Supplemental Balance Sheet Information [Abstract] |
Supplemental Balance Sheet Information | Supplemental Balance Sheet Information Prepaid expenses and other current assets
| June 30, 2023 |  | December 31, 2022
Prepaid clinical, contract research and manufacturing costs | $ | — |  |  | $ | 213 |
Prepaid insurance | 628 |  |  | 408 |
Other | 701 |  |  | 853 |
Prepaid expenses and other current assets | $ | 1,329 |  |  | $ | 1,474 |
Other noncurrent assets
| June 30, 2023 (Restated) |  | December 31, 2022
Restricted cash | $ | 1,200 |  |  | $ | 1,200 |
Prepaid insurance | 1,999 |  |  | 2,252 |
Other | 3 |  |  | 38 |
Other noncurrent assets | $ | 3,202 |  |  | $ | 3,490 |
Property and equipment, net
| June 30, 2023 |  | December 31, 2022
Scientific equipment | $ | 5,265 |  |  | $ | 6,087 |
Computers and software | 63 |  |  | 63 |
Furniture and fixtures | 30 |  |  | 30 |
Property and equipment, gross | 5,358 |  |  | 6,180 |
Less: accumulated depreciation and amortization | (3,562) |  |  | (3,650) |
Property and equipment, net | $ | 1,796 |  |  | $ | 2,530 |
Depreciation and amortization expense was $479 and $593 for the six months ended June 30, 2023 and 2022, respectively. During the six months ended June 30, 2023, the Company sold scientific equipment with a net book value of $255 and recognized a loss of $44 included in other income (expense) in the accompanying statement of operations for the six months ended June 30, 2023. Accrued expenses and other current liabilities
| June 30, 2023 |  | December 31, 2022
Accrued clinical, contract research and manufacturing costs | $ | — |  |  | $ | 48 |
Accrued restructuring costs | — |  |  | 48 |
Lease liability | 580 |  |  | 539 |
Accrued payroll-related expenses | 16 |  |  | 32 |
Accrued federal and state tax payable | — |  |  | 209 |
Accrued other expenses | 492 |  |  | 402 |
Accrued expenses and other current liabilities | $ | 1,088 |  |  | $ | 1,278 |

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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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- Definition Supplemental Balance Sheet Information [Abstract] + References No definition available. + Details
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