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PROPERTY AND EQUIPMENT | 3 Months Ended
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Mar. 31, 2021
PROPERTY AND EQUIPMENT |
PROPERTY AND EQUIPMENT | (2) PROPERTY AND EQUIPMENT The components of property and equipment are as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, 2021 |  | December 31, 2020
Property and equipment | ​ | ​ |  |  | ​ |
Office furniture and equipment | ​ | $ | 2,196 | ​ | $ | 2,362
Assembly equipment | ​ |  | 151 | ​ |  | 143
Vehicles | ​ |  | 198 | ​ |  | 198
Leasehold improvements | ​ |  | 1,013 | ​ |  | 559
Sales Rep demo units | ​ | ​ | 313 | ​ | ​ | 361
Leased devices | ​ |  | 1,086 | ​ |  | 809
​ | ​ | $ | 4,957 | ​ | $ | 4,432
Less accumulated depreciation | ​ |  | (2,658) | ​ |  | (2,507)
​ | ​ | $ | 2,299 | ​ | $ | 1,925
​ Total depreciation expense related to our property and equipment was $0.1 million for each of the three months ended March 31, 2021 and 2020. Total depreciation expense related to devices out on lease was $0.2 million for each of the three months ended March 31, 2021 and 2020. Depreciation on leased units is reflected on the income statement as cost of revenue. Total depreciation expense related to demo unit devices out with sales representatives was $0.1 million and nil for the three months ended March 31, 2021 and 2020, respectively. Deprecation on demo units is reflected on the income statement as sales and marketing expense. The Company monitors devices out on lease for potential loss and places an estimated reserve on the net book value based on an analysis of the number of units of which are still with patients for which the Company cannot determine the current status. The Company monitors demo devices for potential losses and places an estimated reserve on the net book value based on an analysis of terminated territory managers that have not yet returned their units

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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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