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v3.22.1

Property and Equipment, Net | 12 Months Ended
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Dec. 31, 2021
Property and Equipment, Net |
Property and Equipment, Net | 7. Property and Equipment, Net Property and equipment consist of the following ($ in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Useful Life |  | December 31, |  | December 31,
​ | ​ | (Years) | ​ | 2021 | ​ | 2020
Machinery and equipment | ​ | 3 - 10 | ​ | $ | 940 | ​ | $ | 2,894
Office furniture and equipment |  | 3 - 10 |  | ​ | 50 |  | ​ | 49
Leasehold improvements |  | 6 |  | ​ | 228 |  | ​ | 228
Construction in progress |  | N/A |  | ​ | — |  | ​ | 461
​ | ​ | ​ |  | ​ | 1,218 |  | ​ | 3,632
Less: accumulated depreciation and amortization | ​ | ​ |  | ​ | (495) |  | ​ | (3,079)
Property and equipment, net | ​ | ​ | ​ | $ | 723 | ​ | $ | 553
​ Depreciation expense for the year ended December 31, 2021 and 2020 was $99 thousand and $42 thousand, 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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