Income Taxes (Tables)

12 Months Ended

Apr. 30, 2013

Components of Loss Before Income Taxes

U.S. and international components of loss before income taxes were as follows (in thousands):

	Year Ended April 30,
	2013			2012			2011
U.S.	$	(66,762	)	$	(24,711	)	$	(20,378	)
International		1,863			1,193			882
Loss before income taxes	$	(64,899	)	$	(23,518	)	$	(19,496	)

Income Tax Expense (Benefit)

Income tax expense (benefit) is composed of the following (in thousands):

	Year Ended April 30,
	2013			2012			2011
Current:
Federal	$	—		$	—		$	—
State		956			350			256
International		518			767			233
Total		1,474			1,117			489
Deferred:
Federal		(16,705	)		(7,488	)		(6,183	)
State		9			1			1
International		(90	)		(282	)		72
Total		(16,786	)		(7,769	)		(6,110	)
Change in valuation allowance		14,165			7,463			6,182
Provision for (benefit from) income taxes	$	(1,147	)	$	811		$	561

Summary of Difference Between Tax Benefit Derived by Applying Federal Statutory Income Tax Rate to Net Losses and Expense Recognized In Financial Statements

The difference between the tax expense (benefit) derived by applying the Federal statutory income tax rate to net losses and the expense recognized in the financial statements is as follows (in thousands):

	Year Ended April 30,
	2013			2012			2011
U.S. federal taxes at statutory rate	$	(22,066	)	$	(7,996	)	$	(6,629	)
State tax provision		275			237			152
Foreign tax rate differentials		(185	)		(110	)		(48	)
Research and development credit		(1,198	)		(613	)		(586	)
Non-deductible transaction costs		3,956			—			—
Stock options		3,752			1,448			1,209
Permanent differences and other		154			382			281
Change in valuation allowance		14,165			7,463			6,182
Provision for (benefit from) income taxes	$	(1,147	)	$	811		$	561

Components of Net Deferred Tax Amounts

The components of the net deferred tax amounts recognized in the accompanying consolidated balance sheets are (in thousands):

	Year Ended April 30,
	2013			2012
Deferred tax assets:
Bad debts	$	761		$	268
Other accruals		2,158			598
Charitable contributions		216			119
Stock options		3,476			1,520
State tax credit		15			16
Net operating losses		45,309			15,412
Research and development credit		3,169			1,355
Deferred rent		1,045			1,099
Deferred revenue		1,694			1,824
Total deferred tax assets		57,843			22,211
Less valuation allowance		(37,902	)		(19,854	)
Net deferred tax assets		19,941			2,357
Deferred tax liability:
Intangible assets		(16,756	)		—
Depreciation		(3,152	)		(2,116	)
Total deferred tax liability		(19,908	)		(2,116	)
Total net deferred tax assets	$	33		$	241

Aggregate Changes in Balance of Unrecognized Tax Benefits

The aggregate changes in the balance of unrecognized tax benefits were as follows (in thousands):

	Year Ended April 30,
	2013			2012			2011
Unrecognized tax benefits as of May 1,	$	539		$	369		$	174
Tax positions related to prior periods:
Gross increases		862			9			—
Gross decreases		—			(68	)		—
Tax positions related to current period:
Gross increases		330			232			195
Gross decreases		—			—			—
Lapse of statute of limitations		(2	)		(3	)		—
Balance as of April 30,	$	1,729		$	539		$	369