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Financial Statement Details (Tables) | 12 Months Ended
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Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Summary of Inventories | Inventories consist of the following (in thousands):
| December 31,
| 2019 |  | 2018
Finished goods | $ | 21,229 |  |  | $ | 14,797 |
Raw materials and components | 4,061 |  |  | 11,634 |
| $ | 25,290 |  |  | $ | 26,431 |
Summary of Property, Plant and Equipment and Rental Assets | Rental assets consist of the following (in thousands):
| December 31,
| 2019 |  | 2018
Rental assets | $ | 18,176 |  |  | $ | 16,648 |
Less—accumulated depreciation | (12,791 | ) |  | (10,879 | )
| $ | 5,385 |  |  | $ | 5,769 |
Property, plant and equipment consists of the following (in thousands):
| December 31,
| 2019 |  | 2018
Land | $ | 253 |  |  | $ | 247 |
Buildings | 2,303 |  |  | 2,247 |
Test equipment | 10,952 |  |  | 14,444 |
Computer equipment and purchased software | 6,911 |  |  | 4,889 |
Product tooling | 2,139 |  |  | 504 |
Furniture and fixtures | 1,535 |  |  | 677 |
Vehicles | 2,535 |  |  | 1,990 |
Leasehold improvements | 145 |  |  | 136 |
| 26,773 |  |  | 25,134 |
Less—accumulated depreciation and amortization | (16,017 | ) |  | (18,436 | )
| $ | 10,756 |  |  | $ | 6,698 |
Summary of Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities consist of the following (in thousands):
| December 31,
| 2019 |  | 2018
Royalties | $ | 1,415 |  |  | $ | 1,727 |
Payroll and related expenses | 2,716 |  |  | 2,415 |
Professional fees | 483 |  |  | 514 |
Accrued interest | 1,543 |  |  | 239 |
Deferred revenue | 2,235 |  |  | 2,048 |
Operating lease liabilities | 1,101 |  |  | — |
Acquisition-related liabilities | 1,000 |  |  | 1,000 |
Other | 7,368 |  |  | 5,081 |
| $ | 17,861 |  |  | $ | 13,024 |

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