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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

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,
		2015				2014				2013
Domestic		$	(66,411	)		$	(46,998	)		$	(3,107	)
Foreign			(19,126	)			(12,506	)			(11,836	)
Loss before provision for income taxes		$	(85,537	)		$	(59,504	)		$	(14,943	)

Schedule of Components of Benefit From Income Taxes

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

		Years Ended December 31,
		2015				2014				2013
Current:
Federal		$	—			$	—			$	—
State			2				—				—
Foreign			240				—				—
Total current		$	242			$	—			$	—
Deferred:
Federal		$	—			$	—			$	—
State			—				—				—
Foreign			—				—				—
Total deferred		$	—			$	—			$	—
Total provision from income taxes		$	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,
		2015				2014				2013
Tax at statutory federal rate			34.0	%			34.0	%			34.0	%
State tax			—	%			—	%			—	%
Stock-based compensation expense			(4.6	)%			(4.6	)%			(5.7	)%
Net operating losses not benefitted			(21.7	)%			(22.4	)%			(1.6	)%
Foreign net operating losses benefitted			(7.6	)%			(7.1	)%			(26.9	)%
Other			(0.4	)%			0.1	%			0.2	%
Total			(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,
		2015				2014
Federal and state net operating loss carryforwards		$	53,393			$	44,748
Tax credit carryforwards			26,620				24,395
Foreign net operating loss carryforwards			8,421				6,485
Stock-based compensation			8,512				5,836
Lease obligations			4,335				5,204
Reserves and accruals			4,891				5,075
Deferred revenue			10,484				3,304
Other			915				950
Subtotal			117,571				95,997
Less: Valuation allowance			(116,718	)			(94,731	)
Net deferred tax assets			853				1,266
Fixed assets			(853	)			(1,266	)
Net deferred tax liabilities			(853	)			(1,266	)
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 years ended December 31, 2013, 2014 and 2015 is as follows (in thousands):

		Federal and State
Balance as of January 1, 2013		$	12,545
Increase due to prior positions			294
Increase due to current year position			680
Balance as of December 31, 2013			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

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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 55
-Paragraph 217
-URI http://asc.fasb.org/extlink&oid=51663037&loc=d3e36027-109320

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