BALANCE SHEET COMPONENTS (Tables)

12 Months Ended

Jul. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Investments in Marketable Debt Securities, by Contractual Maturity Date

The following table summarizes the estimated fair value of our investments in marketable debt securities by their contractual maturity dates:



	As of July 31, 2018
	(in thousands)
Due within one year	$	463,940
Due in one year through three years	164,388
Total	$	628,328

Schedule of Property, Plant and Equipment

Property and Equipment, Net

Property and equipment, net consists of the following:



	Estimated Useful Life	As of July 31,
	Estimated Useful Life	2017			2018
	(in months)	(in thousands)
Computer, production, engineering, and other equipment	36	$	85,280		$	131,805
Demonstration units	12	46,387			53,547
Leasehold improvements	⁽¹⁾	10,562			19,916
Furniture and fixtures	60	4,744			7,636
Total property and equipment, gross		146,973			212,904
Less: Accumulated depreciation and amortization		(88,901		)	(127,793		)
Total property and equipment, net		$	58,072		$	85,111


(1)	Leasehold improvements are amortized over the shorter of the estimated useful lives of the improvements or the remaining lease term.

Schedule of Finite-Lived Intangible Assets

Intangible assets, net consists of the following:



	As of July 31,
	2017			2018
	(in thousands)
Indefinite-lived intangible asset:
In-process R&D ⁽¹⁾	$	16,100		$	—
Finite-lived intangible assets:
Developed technology ⁽¹⁾	7,300			47,500
Customer relationships	4,830			6,650
Total finite-lived intangible assets, gross	12,130			54,150
Total intangible assets, gross	28,230			54,150
Less:
Accumulated amortization of developed technology	(1,314		)	(6,956		)
Accumulated amortization of customer relationships	(915		)	(1,828		)
Total accumulated amortization	(2,229		)	(8,784		)
Intangible assets, net	$	26,001		$	45,366

(1)

We started amortizing in-process R&D during the first quarter of fiscal 2018, as the related technology was completed and made generally available in the first quarter of fiscal 2018. We are amortizing developed technology using the straight-line method over a useful life of five years. Based on the foregoing, the balance of in-process R&D is now presented as part of developed technology as of July 31, 2018.

Schedule of Indefinite-Lived Intangible Assets

The changes in the net book value of intangible assets, net are as follows:



	As of July 31,
	2017			2018
	(in thousands)
Intangible assets, net—beginning balance	$	—		$	26,001
Acquired intangible assets	28,230			25,920
Amortization of intangible assets ⁽¹⁾	(2,229		)	(6,555		)
Intangible assets, net—ending balance	$	26,001		$	45,366


(1)	Represents amortization expense related to finite-lived intangible assets recognized during the year in the consolidated statements of operations, within product cost of revenue and sales and marketing expenses.

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

stimated future amortization expense of our finite-lived intangible assets is as follows:



Fiscal Year Ending July 31:	Amount
	(in thousands)
2019	$	9,551
2020	9,511
2021	9,511
2022	8,314
2023	3,971
Thereafter	4,508
Total	$	45,366

Schedule of Other Assets, Noncurrent

Other assets—non-current consists of the following:



	As of July 31,
	2017		2018
	(in thousands)
Other tax assets—non-current	$	—	$	30,927
Deferred tax assets—non-current	3,420		2,860
Other	4,229		4,068
Total other assets—non-current	$	7,649	$	37,855

Schedule of Accrued Liabilities

Accrued Compensation and Benefits

Accrued compensation and benefits consists of the following:



	As of July 31,
	2017		2018
	(in thousands)
Contributions to ESPP withheld	$	14,371	$	21,931
Accrued commissions	20,388		21,660
Accrued bonus	7,342		12,129
Accrued vacation	6,286		10,548
Payroll taxes payable	3,434		9,563
Other	5,700		9,567
Total accrued compensation and benefits	$	57,521	$	85,398

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consists of the following:



	As of July 31,
	2017		2018
	(in thousands)
Income taxes payable ⁽¹⁾⁽²⁾	$	3,873	$	20,863
Accrued professional services	4,167		5,838
Other	1,667		4,981
Total accrued expenses and other current liabilities	$	9,707	$	31,682


(1)	Balance as of July 31, 2017 was adjusted to reflect the impact of the adoption of ASC 606 on income taxes. See Note 3 for a summary of adjustments.


(2)	The increase in income taxes payable during the fiscal year ended July 31, 2018 was due primarily to a payable related to the alternative minimum tax associated with the migration of certain intangible assets. For additional details, refer to Note 11.