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Balance Sheet Details | 12 Months Ended
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Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract] |
Balance Sheet Details | Balance Sheet Details Inventories Inventories consist of the following:
| As of December 31,
| 2018 |  | 2017
| (In thousands)
Raw materials | $ | 2,583 |  |  | $ | 2,976 |
Work in process | 145 |  |  | 1,109 |
Finished goods | 4,044 |  |  | 1,074 |
| $ | 6,772 |  |  | $ | 5,159 |
Property, Plant and Equipment, net Property, plant and equipment, net is comprised of the following:
| As of December 31,
| 2018 |  | 2017
| (In thousands)
Building | $ | 40,320 |  |  | $ | 40,320 |
Computer software | 26,127 |  |  | 18,424 |
Computer equipment | 37,223 |  |  | 36,607 |
Furniture and fixtures | 16,286 |  |  | 16,881 |
Leasehold improvements | 10,824 |  |  | 10,110 |
Machinery | 9,097 |  |  | 16,936 |
Construction in progress | 429 |  |  | 1,831 |
| 140,306 |  |  | 141,109 |
Less accumulated depreciation and amortization | (83,278 | ) |  | (86,806 | )
| $ | 57,028 |  |  | $ | 54,303 |
Depreciation expense for the years ended December 31, 2018, 2017 and 2016 was $10.7 million, $13.3 million and $13.0 million, respectively. Accumulated Other Comprehensive Gain (Loss) Accumulated other comprehensive gain (loss) is comprised of the following:
| As of December 31,
| 2018 |  | 2017
| (In thousands)
Foreign currency translation adjustments | $ | (10,040 | ) |  | $ | (5,593 | )
Unrealized gain (loss) on available-for-sale securities, net of tax | (251 | ) |  | 496 |
Total | $ | (10,291 | ) |  | $ | (5,097 | )

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