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Selected Balance Sheet Information | 12 Months Ended
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Dec. 31, 2022
Selected Balance Sheet Information [Abstract] |
Selected balance sheet information |
3. | Selected balance sheet information
Inventory consists of the following at: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
(in thousands) | ​ | 2022 | ​ | 2021
Raw material | ​ | $ | 2,390 | ​ | $ | 1,593
Work-in-process | ​ |  | 1,033 | ​ |  | 482
Finished goods | ​ |  | 3,534 | ​ |  | 1,805
​ | ​ | $ | 6,957 | ​ | $ | 3,880
​ Property and equipment, net consists of the following at: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
(in thousands) | ​ | 2022 | ​ | 2021
Office furniture and equipment | ​ | $ | 350 | ​ | $ | 271
Lab equipment | ​ |  | 2,684 | ​ |  | 1,565
Computer equipment and software | ​ |  | 618 | ​ |  | 556
Leasehold improvements | ​ |  | 95 | ​ |  | 88
Capital equipment in process | ​ |  | 231 | ​ |  | 813
​ | ​ |  | 3,978 | ​ |  | 3,293
Less: Accumulated depreciation and amortization | ​ |  | 2,280 | ​ |  | 1,868
​ | ​ | $ | 1,698 | ​ | $ | 1,425
​ ​ Depreciation is determined using the straight-line method over the estimated useful lives of the respective assets, generally three to five years. Leasehold improvements are amortized on a straight-line basis over the shorter of their estimated useful lives or the term of the lease. Depreciation expense was $0.4 million and $0.2 million for the years ended December 31, 2022 and 2021, respectively. Accrued expenses consist of the following at: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
(in thousands) | ​ | 2022 | ​ | 2021
Clinical trial and other professional fees | ​ | $ | 1,733 | ​ | $ | 1,607
Bonuses | ​ |  | 2,303 | ​ |  | 2,028
Paid time off | ​ |  | 960 | ​ |  | 699
Customer rebates | ​ | ​ | 256 | ​ | ​ | 380
Operating lease liability, current portion | ​ | ​ | 222 | ​ | ​ | —
Taxes | ​ | ​ | 120 | ​ | ​ | 351
Other | ​ |  | 775 | ​ |  | 333
​ | ​ | $ | 6,369 | ​ | $ | 5,398
​

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI https://asc.fasb.org/topic&trid=2122208 + Details
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