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PROPERTY AND EQUIPMENT AND CAPITALIZED SOFTWARE | 12 Months Ended
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Dec. 31, 2023
Property Plant And Equipment Abstract [Abstract] |
Property and Equipment and Capitalized Software | 7. PROPERTY AND EQUIPMENT AND CAPITALIZED SOFTWARE The following table presents the composition of property and equipment, net as of December 31, 2023 and 2022 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ | ​ | 2023 |  | 2022
Laboratory equipment | ​ | $ | 702 | ​ | $ | 462
Office equipment | ​ |  | 495 | ​ |  | 508
Auto | ​ | ​ | 23 | ​ | ​ | —
Computer equipment and software | ​ |  | 1,082 | ​ |  | 1,758
Manufacturing equipment | ​ |  | 551 | ​ |  | 343
Leasehold improvements | ​ |  | 1,436 | ​ |  | 1,435
Rental equipment | ​ |  | 542 | ​ |  | 542
Property and equipment, gross | ​ |  | 4,831 | ​ |  | 5,048
Less: Accumulated depreciation | ​ |  | (2,822) | ​ |  | (3,057)
Property and equipment, net | ​ | $ | 2,009 | ​ | $ | 1,991
​ As of December 31, 2023 and 2022, the Company had capitalized software costs, net of $4.2 million and $3.6 million, respectively, which are included in other assets on the Balance Sheets. During the year ended December 31, 2023, the Company disposed of $0.9 million of fully depreciated property and equipment. Depreciation and amortization expense was $2.0 million, $1.6 million, and $1.1 million for the years ended December 31, 2023, 2022 and 2021, respectively.

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