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v3.24.1.1.u2

Property and Equipment | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Property and Equipment [Abstract] |  |
Property and Equipment | (4) Property and Equipment Property and equipment consist of the following (in thousands):
|  | Estimated Life |  | March 31, 2024 |  | December 31, 2023
Computer equipment |  | 3 years |  | $ | 39 |  |  | $ | 39 |
Lab equipment |  | 5 years |  |  | 130 |  |  |  | 130 |
Furniture and fixtures |  | 5 years |  |  | 37 |  |  |  | 37 |
Computer software |  | 3 years |  |  | 16 |  |  |  | 16 |
|  |  |  |  | 222 |  |  |  | 222 |
Accumulated depreciation and amortization |  |  |  |  | (215 | ) |  |  | (212 | )
Property and equipment, net |  |  |  | $ | 7 |  |  | $ | 10 |
For the three months ended March 31, 2024 and 2023, depreciation and amortization expense was $3,000 and $4,000 respectively. | (4) Property and Equipment Property and equipment consist of the following (in thousands):
|  | Estimated Life |  | December 31, 2023 |  | December 31, 2022
Computer equipment |  | 3 years |  | $ | 39 |  |  | $ | 39 |
Lab equipment |  | 5 years |  |  | 130 |  |  |  | 130 |
Furniture and fixtures |  | 5 years |  |  | 37 |  |  |  | 44 |
Computer software |  | 3 years |  |  | 16 |  |  |  | 16 |
|  |  |  |  | 222 |  |  |  | 229 |
Accumulated depreciation and amortization |  |  |  |  | (212 | ) |  |  | (204 | )
Property and equipment, net |  |  |  | $ | 10 |  |  | $ | 25 |
For the years ended December 31, 2023 and 2022, depreciation and amortization expense was $15,000 and $20,000, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-7 + Details
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