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Income Taxes (Tables)

12 Months Ended

Jan. 31, 2019

Income Tax Disclosure [Abstract]

Components of Loss before Provision for (Benefit from) Income Taxes

The components of loss before provision for (benefit from) income taxes were as follows (in thousands):

	Year Ended January 31,
	2019				2018				2017
									*As Adjusted
Domestic	$	(263,505	)		$	(85,167	)		$	(190,043	)
Foreign	(160,247		)		(229,619		)		(195,470		)
Total	$	(423,752	)		$	(314,786	)		$	(385,513	)

* For further information, see Note 1.

Summary of Provision for (Benefit from) Income Taxes

The provision for (benefit from) income taxes consisted of the following (in thousands):

	Year Ended January 31,
	2019				2018				2017
Current:
Federal	$	—			$	—			$	213
State	270				177				17
Foreign	6,596				4,251				3,573
Total	6,866				4,428				3,803
Deferred:
Federal	(760		)		(535		)		(466		)
State	(2,446		)		(100		)		(52		)
Foreign	(9,154		)		2,643				(4,099		)
Total	(12,360		)		2,008				(4,617		)
Provision for (benefit from) income taxes	$	(5,494	)		$	6,436			$	(814	)

Reconciliation of Income Taxes Computed at Federal Statutory Income Tax Rate and Provision for (Benefit from) Income Taxes

The items accounting for the difference between income taxes computed at the federal statutory income tax rate and the provision for (benefit from) income taxes consisted of the following: 

	Year Ended January 31,
	2019			2018			2017
							*As Adjusted
Federal statutory rate	21.0	%		33.8	%		35.0	%
Effect of:
Foreign income at other than U.S. rates	(8.9	)%		(26.5	)%		(18.5	)%
Intercompany transactions	3.7	%		10.2	%		4.2	%
Research tax credits	12.6	%		9.1	%		6.4	%
State taxes, net of federal benefit	(0.1	)%		—	%		—	%
U.S. corporate tax rate reduction	—	%		(81.3	)%		—	%
Changes in valuation allowance	(39.7	)%		33.0	%		(20.4	)%
Stock compensation	12.7	%		20.0	%		(6.1	)%
Other	—	%		(0.4	)%		(0.4	)%
	1.3	%		(2.1	)%		0.2	%

* For further information, see Note 1.

Schedule of Deferred Tax Assets and Liabilities

Significant components of our deferred tax assets and liabilities were as follows (in thousands):

	January 31,
	2019				2018
Deferred tax assets:
Unearned revenue	$	21,557			$	27,934
Other reserves and accruals	23,384				14,945
Federal net operating loss carryforwards	602,310				422,235
State and foreign net operating loss carryforwards	202,607				81,757
Property and equipment	7,168				—
Share-based compensation	51,233				39,294
Research and development credits	164,555				110,694
Intangibles	519,402				—
Other	2,208				5,622
	1,594,424				702,481
Valuation allowance	(1,515,945		)		(625,030		)
Deferred tax assets, net of valuation allowance	78,479				77,451
Deferred tax liabilities:
Intangibles	—				(1,453		)
Intercompany transactions	(29,885		)		(40,338		)
Other prepaid assets	(448		)		(742		)
Deferred commissions	(45,277		)		(29,231		)
Property and equipment	—				(3,803		)
	(75,610		)		(75,567		)
Net deferred tax assets	$	2,869			$	1,884

Summary of Reconciliation of Gross Unrecognized Tax Benefit

A reconciliation of the gross unrecognized tax benefit is as follows (in thousands):

	Year Ended January 31,
	2019				2018				2017
Unrecognized tax benefits at the beginning of the period	$	107,849			$	116,801			$	98,460
Additions for tax positions taken in prior years	10,586				1,500				3,981
Reductions for tax positions taken in prior years	—				(8,121		)		—
Decrease for tax positions taken in prior years due to federal rate reduction	—				(10,062		)		—
Additions for tax positions related to the current year	12,336				7,731				14,475
Reductions related to a lapse of applicable statute of limitations	—				—				(115		)
Unrecognized tax benefits at the end of the period	$	130,771			$	107,849			$	116,801

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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