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Selected Balance Sheet Information | 9 Months Ended
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Sep. 30, 2021
Selected Balance Sheet Information [Abstract] |
Selected balance sheet information |
3. | Selected balance sheet information
Inventory consists of the following at: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | December 31,
(in thousands) | ​ | 2021 | ​ | 2020
Raw material | ​ | $ | 1,083 | ​ | $ | 1,361
Work-in-process | ​ |  | 287 | ​ |  | 321
Finished goods | ​ |  | 2,070 | ​ |  | 1,661
​ | ​ | $ | 3,440 | ​ | $ | 3,343
​ Property and equipment, net consists of the following at: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | December 31,
(in thousands) | ​ | 2021 | ​ | 2020
Office furniture and equipment | ​ | $ | 271 | ​ | $ | 189
Lab equipment | ​ |  | 1,440 | ​ |  | 1,272
Computer equipment and software | ​ |  | 516 | ​ |  | 516
Leasehold improvements | ​ |  | 45 | ​ |  | 44
Capital equipment in process | ​ |  | 483 | ​ |  | 89
​ | ​ |  | 2,755 | ​ |  | 2,110
Less: Accumulated depreciation and amortization | ​ |  | 1,812 | ​ |  | 1,700
​ | ​ | $ | 943 | ​ | $ | 410
​ Depreciation expense was $42,000 and $17,000 for the three months ended September 30, 2021 and 2020, respectively, and $112,000 and $52,000 for the nine months ended September 30, 2021 and 2020, respectively. Accrued expenses consist of the following at: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | December 31,
(in thousands) | ​ | 2021 | ​ | 2020
Clinical trial and other professional fees | ​ | $ | 1,638 | ​ | $ | 1,690
Bonuses | ​ |  | 1,628 | ​ |  | 794
Paid time off | ​ |  | 723 | ​ |  | 552
Interest payable | ​ | ​ | 451 | ​ | ​ | 356
Other | ​ |  | 537 | ​ |  | 191
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | 4,977 | ​ | $ | 3,583
​

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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