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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of Components of Loss Before Income Taxes

The components of loss before income taxes are as follows (in thousands):

		Years Ended December 31,
		2016				2015				2014
Domestic		$	(38,156	)		$	(66,411	)		$	(46,998	)
Foreign			(23,595	)			(19,126	)			(12,506	)
Loss before provision for income taxes		$	(61,751	)		$	(85,537	)		$	(59,504	)

Schedule of Components of Provision For (Benefit From) Income Taxes

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

		Years Ended December 31,
		2016				2015				2014
Current:
Federal		$	—			$	—			$	—
State			2				2				—
Foreign			139				240				—
Total current		$	141			$	242			$	—
Deferred:
Federal		$	(212	)		$	—			$	—
State			—				—				—
Foreign			—				—				—
Total deferred		$	(212	)		$	—			$	—
Total provision for (benefit from) income taxes		$	(71	)		$	242			$	—

Schedule of Reconciliation Between Statutory Federal Income Tax Rate and Effective Tax Rate

The following is the reconciliation between the statutory federal income tax rate and the Company’s effective tax rate:

	Years Ended December 31,
	2016				2015				2014
Tax at statutory federal rate		34.0	%			34.0	%			34.0	%
State tax		—	%			—	%			—	%
Stock-based compensation expense		(7.9	)%			(4.6	)%			(4.6	)%
Net operating losses not benefitted		(12.9	)%			(21.7	)%			(22.4	)%
Foreign net operating losses benefitted		(13.0	)%			(7.6	)%			(7.1	)%
Other		(0.1	)%			(0.4	)%			0.1	%
Total		0.1	%			(0.3	)%			—	%

Schedule of Significant Components of Deferred Tax Assets

Significant components of the Company’s deferred tax assets are as follows (in thousands):

		December 31,
		2016				2015
Federal and state net operating loss carryforwards		$	42,900			$	53,393
Tax credit carryforwards			29,846				26,620
Foreign net operating loss carryforwards			11,704				8,421
Stock-based compensation			11,231				8,512
Lease obligations			4,414				4,335
Reserves and accruals			5,465				4,891
Deferred revenue			22,909				10,484
Other			741				915
Subtotal			129,210				117,571
Less: Valuation allowance			(128,995	)			(116,718	)
Net deferred tax assets			215				853
Fixed assets			(122	)			(853	)
Other			(93	)			—
Net deferred tax liabilities			(215	)			(853	)
Total net deferred tax assets		$	—			$	—

Schedule of Reconciliation of the Beginning and Ending Amounts of Unrecognized Income Tax Benefits

A reconciliation of the beginning and ending amounts of unrecognized income tax benefits during the three years ended December 31, 2016 is as follows (in thousands):

		Federal and State
Balance as of January 1, 2014		$	13,519
Increase due to prior positions			1,493
Increase due to current year position			4,110
Balance as of December 31, 2014			19,122
Decrease due to prior positions			(2,382	)
Increase due to current year position			7,473
Balance as of December 31, 2015			24,213
Decrease due to prior positions			(7,109	)
Increase due to current year position			2,550
Balance as of December 31, 2016		$	19,654

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 55
-Paragraph 217
-URI http://asc.fasb.org/extlink&oid=75116239&loc=d3e36027-109320

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-Paragraph 15A
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