Income Taxes (Tables)

12 Months Ended

Jan. 31, 2018

Income Tax Disclosure [Abstract]

Schedule Of Geographical Breakdown Of Loss Before Provision For Income Taxes

The geographical breakdown of loss before provision for income taxes is as follows (in thousands):

	Year Ended January 31,
	2016			2017			2018
Domestic	$	(195,019	)	$	(200,355	)	$	(135,115	)
International	(17,164		)	(42,824		)	(38,598		)
Total	$	(212,183	)	$	(243,179	)	$	(173,713	)

Schedule of Components of Provision for Income Taxes

The components of the provision for income taxes are as follows (in thousands):

	Year Ended January 31,
	2016			2017			2018
Current:
State	$	210		$	389		$	525
Foreign	2,198			1,806			3,580
Total	$	2,408		$	2,195		$	4,105
Deferred:
Foreign	(839		)	(308		)	(216		)
Provision for income taxes	$	1,569		$	1,887		$	3,889

Reconciliation of the Federal Statutory Income Tax Rate and Effective Income Tax Rate

The reconciliation of the federal statutory income tax rate and effective income tax rate is as follows (in thousands):

	Year Ended January 31,
	2016			2017			2018
Tax at federal statutory rate	$	(72,142	)	$	(82,682	)	$	(57,144	)
State tax, net of federal benefit	152			276			351
Stock-based compensation expense	10,866			(5,242		)	(9,953		)
Research and development tax credits	(3,832		)	(1,570		)	(7,629		)
Foreign rate differential	7,106			15,878			18,667
Change in valuation allowance	58,979			73,863			(48,703		)
Remeasurement of deferred tax assets and liabilities	—			—			107,029
Other	440			1,364			1,271
Provision for income taxes	$	1,569		$	1,887		$	3,889

Significant Components of Deferred Tax Assets and Liabilities

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

	January 31,
	2017			2018
Deferred tax assets:
Net operating loss carryforwards	$	173,942		$	127,621
Tax credit carryover	15,319			33,105
Accruals and reserves	3,112			1,809
Deferred revenue	53,424			46,570
Stock-based compensation expense	26,401			24,133
Depreciation and amortization	7,302			15,367
Charitable contribution carryforwards	4,345			2,892
Other	—			465
Total deferred tax assets	283,845			251,962
Valuation allowance	(271,779		)	(240,519		)
Total deferred tax assets, net of valuation allowance	12,066			11,443
Deferred tax liabilities:
Deferred commissions	(11,222		)	(10,383		)
Total deferred tax liabilities	(11,222		)	(10,383		)
Net deferred tax assets	$	844		$	1,060

Summary of Activity Related to Unrecognized Tax Benefits

The activity related to the unrecognized tax benefits is as follows (in thousands):

	Year Ended January 31,
	2016			2017			2018
Gross unrecognized tax benefits—beginning balance	$	13,874		$	15,470		$	6,375
Decreases related to tax positions taken during    prior years	(3,969		)	(11,286		)	(24		)
Increases related to tax positions taken during    prior years	35			—			619
Increases related to tax positions taken during    current year	5,530			2,191			5,431
Gross unrecognized tax benefits—ending balance	$	15,470		$	6,375		$	12,401