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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Accounting Policies [Abstract] |
Schedule of Inventory | At December 31, 2017 and 2016, inventory consisted of the following (in thousands):
| 2017 |  | 2016
Raw materials -current | $ | 22,813 |  |  | $ | 15,877 |
Raw materials - long term | 2,829 |  |  | 2,488 |
Finished Goods | 1,022 |  |  | 2,558 |
Work in process | 2,389 |  |  | 2,998 |
Total | $ | 29,053 |  |  | $ | 23,921 |
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 |
Schedule of Identified Finite-Lived Intangible Assets, Finite Lived | The following table represents the identified intangible assets by major asset class (in thousands):
|  |  |  | December 31, 2017 |  | December 31, 2016
|  | Useful Life (years) |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Book Value |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Book Value
Developed Technology |  | 20 |  | $ | 2,505 |  |  | $ | 1,633 |  |  | $ | 872 |  |  | $ | 2,505 |  |  | $ | 1,508 |  |  | $ | 997 |
Trade Name |  | Indefinite |  | 654 |  |  | — |  |  | 654 |  |  | 654 |  |  | — |  |  | 654 |
Total |  |  |  | $ | 3,159 |  |  | $ | 1,633 |  |  | $ | 1,526 |  |  | $ | 3,159 |  |  | $ | 1,508 |  |  | $ | 1,651 |
Schedule of Identified Indefinite-Lived Intangible Assets | The following table represents the identified intangible assets by major asset class (in thousands):
|  |  |  | December 31, 2017 |  | December 31, 2016
|  | Useful Life (years) |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Book Value |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Book Value
Developed Technology |  | 20 |  | $ | 2,505 |  |  | $ | 1,633 |  |  | $ | 872 |  |  | $ | 2,505 |  |  | $ | 1,508 |  |  | $ | 997 |
Trade Name |  | Indefinite |  | 654 |  |  | — |  |  | 654 |  |  | 654 |  |  | — |  |  | 654 |
Total |  |  |  | $ | 3,159 |  |  | $ | 1,633 |  |  | $ | 1,526 |  |  | $ | 3,159 |  |  | $ | 1,508 |  |  | $ | 1,651 |
Computation of Basic and Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share amounts):
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Numerator: |  |  |  |  |
Net income | $ | 19,851 |  |  | $ | 6,469 |  |  | $ | 10,147 |
Denominator for basic net income per common share: |  |  |  |  |  |  |
Weighted average common shares outstanding | 12,831 |  |  | 12,702 |  |  | 12,567 |
Denominator for diluted net income per share: |  |  |  |  |  |  |
Weighted average common shares outstanding | 12,831 |  |  | 12,702 |  |  | 12,567 |
Dilutive effect of stock options and restricted shares | 279 |  |  | 233 |  |  | 226 |
Diluted weighted average shares | 13,110 |  |  | 12,935 |  |  | 12,793 |
Earnings per common share: |  |  |  |  |  |  |
Basic | $ | 1.55 |  |  | $ | 0.51 |  |  | $ | 0.81 |
Diluted | $ | 1.51 |  |  | $ | 0.50 |  |  | $ | 0.79 |

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