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Condensed Consolidated Financial Statement Details (Tables) | 9 Months Ended
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Sep. 30, 2017
Property, Plant and Equipment [Abstract] |
Schedule of Inventory |
| September 30, 2017 |  | December 31, 2016
| (in thousands)
Raw materials | $ | 6,985 |  |  | $ | 6,669 |
Finished goods | 8,959 |  |  | 8,401 |
Total inventory | $ | 15,944 |  |  | $ | 15,070 |
Schedule of Property and Equipment, Net |
| Useful Life |  | September 30, 2017 |  | December 31, 2016
| (in years) |  | (in thousands)
Equipment | 1-3 |  | $ | 46,161 |  |  | $ | 41,815 |
Software | 1-3 |  | 3,859 |  |  | 3,801 |
Furniture and fixtures | 1-3 |  | 820 |  |  | 865 |
Leasehold improvements | 2-8 |  | 3,772 |  |  | 2,724 |
Construction in progress |  |  | 74 |  |  | 258 |
Property and equipment, gross |  |  | 54,686 |  |  | 49,463 |
Less: accumulated depreciation |  |  | (45,155 | ) |  | (41,244 | )
Property and equipment, net |  |  | $ | 9,531 |  |  | $ | 8,219 |
Schedule of Acquired Intangible Assets | Purchased intangible assets, net, consisted of the following (in thousands):
| September 30, 2017 |  | December 31, 2016
| Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Developed technology | $ | 5,050 |  |  | $ | (1,262 | ) |  | $ | 3,788 |  |  | $ | 5,050 |  |  | $ | (505 | ) |  | $ | 4,545 |
Patents | 2,936 |  |  | (1,173 | ) |  | 1,763 |  |  | 2,936 |  |  | (848 | ) |  | 2,088 |
Total | $ | 7,986 |  |  | $ | (2,435 | ) |  | $ | 5,551 |  |  | $ | 7,986 |  |  | $ | (1,353 | ) |  | $ | 6,633 |
Schedule of Future Amortization Expense for Purchased Finite-lived Intangible Assets | Future amortization expense for purchased intangible assets as of September 30, 2017 is as follows (in thousands):
Fiscal Year |  |
Remainder of 2017 |  | $ | 361 |
2018 |  | 1,442 |
2019 |  | 1,442 |
2020 |  | 1,442 |
2021 |  | 864 |
|  | $ | 5,551 |
Schedule of Accrued Liabilities |
| September 30, 2017 |  | December 31, 2016
| (in thousands)
Accrued compensation and benefits | $ | 19,828 |  |  | $ | 22,326 |
Accrued tax liabilities | 3,040 |  |  | 3,340 |
Other | 4,736 |  |  | 5,859 |
Total accrued liabilities | $ | 27,604 |  |  | $ | 31,525 |
Schedule of Deferred Revenue |
| September 30, 2017 |  | December 31, 2016
| (in thousands)
Deferred revenue: |  |  |
Products | $ | 3,076 |  |  | $ | 4,182 |
Services | 87,928 |  |  | 88,726 |
Total deferred revenue | 91,004 |  |  | 92,908 |
Less: current portion | (59,294 | ) |  | (61,334 | )
Non-current portion | $ | 31,710 |  |  | $ | 31,574 |

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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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