| BALANCE SHEET COMPONENTS |
BALANCE SHEET COMPONENTS Short-Term Investments—The amortized cost of the Company’s short-term investments approximate their fair value. As of July 31, 2016 and January 31, 2017, unrealized gains or losses from the Company’s short-term investments were immaterial and there were no securities in an unrealized loss position for more than 12 months. The following table summarizes the estimated fair value of the Company’s investments in marketable debt securities, by the contractual maturity date (in thousands): | | | | | | As of January 31, 2017 | Due within 1 year | $ | 87,169 |
| Due after 1 year through 3 years | 41,978 |
| Total | $ | 129,147 |
|
Property and Equipment—Net—Property and equipment, net consists of the following (in thousands): | | | | | | | | | | | | Estimated
Useful Life (In months) | | As of | | | July 31, 2016 | | January 31,
2017 | Computer, production, engineering and other equipment | 36 | | $ | 54,161 |
| | $ | 70,219 |
| Demonstration units | 12 | | 33,184 |
| | 40,962 |
| Leasehold improvements | * | | 6,619 |
| | 8,213 |
| Furniture and fixtures | 60 | | 3,641 |
| | 4,001 |
| Total property and equipment—gross | | | 97,605 |
|
| 123,395 |
| Less accumulated depreciation and amortization | | | (55,387 | ) | | (71,451 | ) | Total property and equipment—net | | | $ | 42,218 |
|
| $ | 51,944 |
|
______________ | | * | Leasehold improvements are amortized over the shorter of the estimated useful lives of the improvements or the remaining lease term. |
Depreciation and amortization expense related to the Company's property and equipment was $6.3 million and $11.8 million, respectively, for the three and six months ended January 31, 2016. Depreciation and amortization expense related to the Company's property and equipment was $9.0 million and $17.2 million, respectively, for the three and six months ended January 31, 2017. Intangible Assets—Net—Intangible assets, net consists of the following (in thousands): | | | | | | As of January 31, 2017 | Indefinite-lived intangible asset: | | In-process R&D | $ | 16,100 |
| Finite-lived intangible assets: | | Developed technology | 7,300 |
| Customer relationships | 4,830 |
| Total finite-lived intangible assets, gross | 12,130 |
| Total intangible assets, gross | 28,230 |
| Less: | | Accumulated amortization of developed technology | (598 | ) | Accumulated amortization of customer relationships | (415 | ) | Total accumulated amortization | (1,013 | ) | Intangible assets, net | $ | 27,217 |
|
Changes in the net book value of intangible assets are as follows (in thousands): | | | | | | Six Months Ended
January 31, 2017 | Intangible assets, net—beginning balance | $ | — |
| Acquired in the Calm Acquisition | 3,960 |
| Acquired in the PernixData Acquisition | 24,270 |
| Amortization of intangible assets * | (1,013 | ) | Intangible assets, net—ending balance | $ | 27,217 |
|
______________ | | * | Represents amortization expense of finite-lived intangible assets recorded in the condensed consolidated statement of operations during the period within product cost of revenue and sales and marketing expenses. |
Estimated future amortization expense of finite-lived intangible assets is as follows: | | | | | Year Ending July 31: | (In thousands) | 2017 (remaining six months) | $ | 1,215 |
| 2018 | 2,220 |
| 2019 | 2,201 |
| 2020 | 2,201 |
| 2021 | 2,201 |
| Thereafter | 1,079 |
| Total | $ | 11,117 |
|
Accrued Compensation and Benefits—Accrued compensation and benefits consists of the following (in thousands): | | | | | | | | | | As of | | July 31, 2016 | | January 31,
2017 | Accrued commissions | $ | 14,203 |
| | $ | 10,270 |
| Accrued vacation | 3,490 |
| | 4,513 |
| Contributions to ESPP withheld | — |
| | 13,337 |
| Accrued bonus | 3,592 |
| | 3,486 |
| Other | 3,262 |
| | 5,039 |
| Total accrued compensation and benefits | $ | 24,547 |
|
| $ | 36,645 |
|
Accrued Expenses and Other Liabilities—Accrued expenses and other liabilities consists of the following (in thousands): | | | | | | | | | | As of | | July 31, 2016 | | January 31,
2017 | Accrued professional services | $ | 3,585 |
| | $ | 3,184 |
| Income taxes payable | 1,417 |
| | 1,812 |
| Other | 535 |
| | 1,408 |
| Total accrued expenses and other liabilities | $ | 5,537 |
|
| $ | 6,404 |
|
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