Provision for Income Taxes (Tables)

12 Months Ended

Apr. 30, 2016

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

The components of the provision (benefit) for income taxes are as follows (in thousands):

	Year Ended April 30, 2016
	Federal			State			Foreign			Total
Current	$	—		$	—		$	92		$	92
Deferred	(3,322		)	(537		)	11			(3,848		)
Change in valuation allowance	3,322			537			(11		)	3,848
Total	$	—		$	—		$	92		$	92

	Year Ended April 30, 2015
	Federal *			State *			Foreign			Total
Current	$	—		$	3		$	124		$	127
Deferred	(3,912		)	(287		)	8			(4,191		)
Change in valuation allowance	3,912			287			(8		)	4,191
Total	$	—		$	3		$	124		$	127

* The deferred and change in valuation allowance amounts for federal and state in the table above relating to the year ended April 30, 2015 were incorrectly presented in the previous filed 10-K on July 29, 2015 and have since been corrected herein. The incorrect disclosure had no impact on the total income tax expense or any other account balances of the Company's consolidated financial statements at April 30, 2015.

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation between the Company’s effective tax rate and the United States statutory tax rate for the years ended April 30, 2016 and 2015 is as follows:

	Year Ended April 30,
	2016		2015
Federal income tax at statutory rate	34.0	%	34.0	%
State income tax, net of federal benefit	3.1		2.6
Permanent differences	(0.2	)	0.9
Increase in uncertain tax position	(0.6	)	(0.8	)
Other	(2.2	)	(6.9	)
Change in valuation allowance	(37.2	)	(30.8	)
Changes in tax rates	2.2		—
Income tax expense	(0.9	)%	(1.0	)%

Schedule of Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities as of April 30, 2016 and 2015 consist of the following (in thousands):

	As of April 30,
	2016			2015
Accrued liabilities	$	21		$	21
State taxes	12			1
Stock-based compensation expense	5,528			4,803
Capitalized research and development costs	316			433
Foreign net operating loss carry-forward	224			235
Net operating loss carry-forward	12,970			9,719
Total deferred tax assets	19,071			15,212
Less: Valuation allowance	(19,071		)	(15,212		)
Net deferred tax asset	$	—		$	—

Schedule of Unrecognized Tax Benefits Roll Forward

The following table indicates the changes to the Company’s uncertain tax positions for the period and years ended April 30, 2016 and 2015 in thousands:

	Year Ended April 30,
	2016		2015
Balance, beginning of the year	$	100	$	—
Addition based on tax positions related to prior years	42		21
Addition based on tax positions related to current year	23		79
Balance, end of year	$	165	$	100