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Property and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2017
Property, Plant and Equipment [Abstract] |
Summary of Property and Equipment | The majority of our property and equipment, including rental equipment, is a direct cost to generating revenue and the following table depicts the depreciation associated with each product line at December 31, 2017 , 2016 and 2015 (in thousands):
| 2017 |  | 2016 |  | 2015
Rentals | $ | 20,861 |  |  | $ | 21,325 |  |  | $ | 22,308 |
Sales | 265 |  |  | 291 |  |  | 281 |
Service & Maintenance | 21 |  |  | 25 |  |  | 16 |
Total | $ | 21,147 |  |  | $ | 21,641 |  |  | $ | 22,605 |
Property and equipment consists of the following at December 31, 2017 and 2016 (in thousands):
| Useful Lives (Years) |  | 2017 |  | 2016
Land | — |  | $ | 1,290 |  |  | $ | 169 |
Building | 39 |  | 6,116 |  |  | 6,856 |
Leasehold improvements | 39 |  | 808 |  |  | 794 |
Office equipment and furniture | 5 |  | 1,490 |  |  | 1,454 |
Software | 5 |  | 573 |  |  | 573 |
Machinery and equipment | 7 |  | 3,133 |  |  | 3,111 |
Vehicles | 3 |  | 5,516 |  |  | 6,063 |
Total |  |  | 18,926 |  |  | 19,020 |
Less accumulated depreciation |  |  | (11,274 | ) |  | (11,267 | )
Total |  |  | $ | 7,652 |  |  | $ | 7,753 |

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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://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
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