Income taxes (Tables)

12 Months Ended

Jan. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of Domestic and Foreign Components of Loss before Provision for Income Taxes

The domestic and foreign components of loss before provision for income taxes consisted of the following (in thousands):

	Years Ended January 31,
	2020		2019		2018
Domestic	$	(340,542)	$	(191,479)	$	(372,466)
Foreign	12,660		4,248		4,873
Net loss before provision for income taxes	$	(327,882)	$	(187,231)	$	(367,593)

Schedule of Components of Provision for Income Tax

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

	Years Ended January 31,
	2020		2019		2018
Current:
Federal	$	—	$	—	$	—
State	(18)		(106)		(112)
Foreign	(8,766)		(5,371)		(3,097)
Total	(8,784)		(5,477)		(3,209)
Deferred:
Federal	—		—		917
State	—		—		—
Foreign	84		59		213
Total	84		59		1,130
Total provision for income taxes	$	(8,700)	$	(5,418)	$	(2,079)

Reconciliation of Income Taxes at Statutory Federal Income Tax Rate to Provision for Income Taxes

A reconciliation of income taxes at the statutory federal income tax rate to the provision for income taxes included in the consolidated statements of operations is as follows (in thousands):

	Years Ended January 31,
	2020		2019		2018
U.S. federal statutory income tax	$	68,856	$	39,318	$	124,287
Research tax credits	6,120		10,044		7,976
Stock-based compensation	(6,395)		(3,004)		(5,124)
Change in valuation allowance	8,566		(42,450)		2,907
Foreign tax rate differential	(6,384)		(4,945)		—
Legal expenses	—		(4,000)		—
Federal tax rate change	—		—		(132,387)
Global intangible low-taxed income	(3,668)		—		—
Non-deductible compensation	(1,150)		—		—
Change in U.S. tax status of foreign entities	(72,449)		—		—
Other	(2,196)		(381)		262
Provision for income taxes	$	(8,700)	$	(5,418)	$	(2,079)

Schedule of Deferred Tax Assets and Liabilities

The deferred tax assets and liabilities were as follows (in thousands):

	As of January 31,
	2020		2019
Deferred tax assets:
Accruals and reserves	$	7,948	$	13,753
Deferred revenue	28,621		—
Net operating loss carryforwards	475,390		430,220
Research and development credits and other credits	75,168		62,869
Stock-based compensation	18,428		30,946
ROU assets/lease liability	53,048		—
Gross deferred tax assets	658,603		537,788
Less valuation allowance	(459,649)		(454,278)
Total deferred tax assets, net of valuation allowance	198,954		83,510
Deferred tax liabilities:
Depreciation and amortization	(128,825)		(61,285)
Deferred revenue	—		(5,026)
ROU assets/lease liability	(48,085)		—
Deferred costs	(21,609)		(16,768)
Gross deferred tax liabilities	(198,519)		(83,079)
Net deferred tax assets	$	435	$	431

Schedule of Changes in Gross Unrecognized Tax Benefits

The following table reflects the changes in the gross unrecognized tax benefits (in thousands):

	Years Ended January 31,
	2020		2019		2018
Balance as of beginning of year	$	18,600	$	11,700	$	9,600
Tax positions taken in prior period:
Gross increases	600		—		—
Tax positions taken in current period:
Gross decreases	—		(1,000)		—
Gross increases(1)	5,200		7,900		2,100
Balance as of end of year	$	24,400	$	18,600	$	11,700

(1) Includes $7.4 million from the Hortonworks merger for fiscal year 2019.