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PROPERTY AND EQUIPMENT (Tables) | 3 Months Ended
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Mar. 31, 2022
PROPERTY AND EQUIPMENT. |
Schedule of property and equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | March 31, | ​ | December 31,
​ |  | Estimated Useful Lives |  | 2022 |  | 2021
Lab and manufacturing equipment | ​ | 5 Years | ​ | $ | 8,460,000 | ​ | $ | 7,851,000
Computers, equipment and software |  | 3-5 Years | ​ | ​ | 1,064,000 | ​ | ​ | 1,020,000
Office furniture |  | 5 Years | ​ |  | 896,000 | ​ |  | 793,000
Leasehold improvements | ​ | Lesser of lease term or estimated useful life | ​ | ​ | 3,173,000 | ​ | ​ | 3,173,000
Total |  |  | ​ | ​ | 13,593,000 | ​ | ​ | 12,837,000
Less: accumulated depreciation |  |  | ​ |  | (3,316,000) | ​ |  | (2,740,000)
Construction in progress | ​ | ​ | ​ | ​ | 4,089,000 | ​ | ​ | 2,226,000
Total fixed assets, net |  |  | ​ | $ | 14,366,000 | ​ | $ | 12,323,000

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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