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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of Components of Deferred Tax Assets and Liabilities

The significant components of our deferred tax assets and liabilities for the periods presented are as follows (in thousands):

		December 31,
		2020				2019
Deferred tax assets
Net operating losses		$	105,433			$	79,035
Tax credit carryforward			18,981				11,152
Non qualifying stock options			12,096				9,150
Deferred rent			—				11,755
Operating lease liabilities			31,052				—
Deferred revenue			59,713				1,706
Other			2,983				1,892
Total deferred tax assets			230,258				114,690
Valuation allowance			(197,527	)			(100,906	)
Deferred tax assets, net of valuation allowance			32,731				13,784
Deferred tax liabilities
Tangible and intangible assets			(5,760	)			(13,784	)
ROU assets			(26,971	)			—
Net deferred taxes		$	—			$	—

Schedule of Reconciliation of Effective Tax Rate of Provision for Income Taxes Differs from Federal Statutory Rate

The effective tax rate of our provision for income taxes differs from the federal statutory rate for the periods presented as follows:

		Year Ended December 31,
		2020		2019		2018
Statutory rate		21.0%		21.0%		21.0%
State tax		13.8		8.1		5.5
Stock compensation		25.2		9.8		0.5
Permanent items		(0.1)		(1.0)		0.5
Credits		5.7		6.1		2.7
Other		0.5		0.3		0.1
Change in valuation allowance		(66.1)		(44.3)		(30.3)
Total		0.0%		0.0%		0.0%

Schedule of Change in Unrecognized Tax Benefits

A reconciliation of the beginning and ending amounts of unrecognized tax benefits during the periods presented are as follows (in thousands):

Balance at December 31, 2017		$	1,031
Additions in 2018			229
Balance at December 31, 2018			1,260
Additions in 2019			792
Balance at December 31, 2019			2,052
Additions in 2020			1,437
Balance at December 31, 2020		$	3,489

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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
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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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Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months.

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