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Balance Sheet Details | 12 Months Ended
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Dec. 31, 2017
Balance Sheet Related Disclosures [Abstract] |
Balance Sheet Details | Balance Sheet Details Inventories Inventories consist of the following:
| As of December 31,
| 2017 |  | 2016
| (In thousands)
Raw materials | $ | 2,976 |  |  | $ | 3,773 |
Work in process | 1,109 |  |  | 616 |
Finished goods | 1,074 |  |  | 1,244 |
| $ | 5,159 |  |  | $ | 5,633 |
Property, Plant and Equipment, net Property, plant and equipment, net is comprised of the following:
| As of December 31,
| 2017 |  | 2016
| (In thousands)
Building | $ | 40,320 |  |  | $ | 40,320 |
Computer software | 18,424 |  |  | 20,922 |
Computer equipment | 36,607 |  |  | 36,608 |
Furniture and fixtures | 16,881 |  |  | 15,140 |
Leasehold improvements | 10,110 |  |  | 7,176 |
Machinery | 16,936 |  |  | 17,406 |
Construction in progress | 1,831 |  |  | 1,075 |
| 141,109 |  |  | 138,647 |
Less accumulated depreciation and amortization | (86,806 | ) |  | (80,205 | )
| $ | 54,303 |  |  | $ | 58,442 |
Depreciation expense for the years ended December 31, 2017, 2016 and 2015 was $13.3 million, $13.0 million and $12.4 million, respectively. Accumulated Other Comprehensive Gain (Loss) Accumulated other comprehensive gain (loss) is comprised of the following:
| As of December 31,
| 2017 |  | 2016
| (In thousands)
Foreign currency translation adjustments | $ | (5,593 | ) |  | $ | (13,392 | )
Unrealized gain (loss) on available-for-sale securities, net of tax | 496 |  |  | (116 | )
Total | $ | (5,097 | ) |  | $ | (13,508 | )

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