Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Taxes

Schedule of reconciliation of the statutory U.S. federal rate to the Company's effective tax rate

	Years ended December 31,
	2015			2014			2013
Percent of pre-tax income:
U.S. federal statutory income tax rate		35.0	%		35.0	%		35.0	%
State taxes, net of federal benefit		7.4	%		6.8	%		—
Permanent items		(0.5	)%		2.3	%		(2.2	)%
Impact of state rate changes		0.9	%		—			—
Research and development credit		—			—			2.7	%
Change in valuation allowance		(29.1	)%		(89.5	)%		(35.5	)%
Effective income tax rate		13.7	%		(45.4	)%		0.0	%

Schedule of components of income tax (benefit) expense

	Years ended December 31,
	2015			2014			2013
Current:
Federal	$	136		$	29,505		$	—
State		91			11,440			—
Deferred:
Federal		(17,014	)		(4,469	)		—
State		—			—			—
Income tax (benefit) expense	$	(16,787	)	$	36,476		$	—

Schedule of significant components of the Company's deferred tax assets (liabilities)

	As of December 31,
	2015			2014
Deferred tax assets (liabilities)
Deferred revenue	$	142,675		$	120,611
License and technology payments		13,150			14,251
Share-based compensation		11,427			5,679
Accrued expenses		743			442
Depreciation		(617	)		(328	)
Federal and state net operating loss carryforwards		26,065			—
Excess tax benefits related to share-based compensation		1,630			—
Charitable contribution carryforwards		5			—
Deferred income tax assets		195,078			140,655
Valuation allowance		(171,965	)		(136,138	)
Net deferred tax assets	$	23,113		$	4,517