Provision for Income Taxes (Tables)

12 Months Ended

Apr. 30, 2015

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

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

 

	Year Ended April 30, 2015
	Federal			State			Foreign			Total
Current	$	—		$	3		$	124		$	127
Deferred		(25,948	)		(1,771	)		8			(27,711	)
Change in valuation allowance		25,948			1,771			(8	)		27,711
Total	$	—		$	3		$	124		$	127

	Year Ended April 30, 2014
	Federal			State			Foreign		Total
Current	$	—		$	5		$	12	$	17
Deferred		(2,015	)		(148	)		—		(2,163	)
Change in valuation allowance		2,015			148			—		2,163
Total	$	—		$	5		$	12	$	17

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation between the Company’s effective tax rate and the United States statutory tax rate for the years ended April 30, 2015 and 2014 is as follows:

	Year Ended April 30,
	2015			2014
Federal income tax at statutory rate		34.0	%		34.0	%
State income tax, net of federal benefit		2.6			2.1
Permanent differences		0.9			(5.6	)
Increase in uncertain tax position		(0.8	)		—
Other		(6.9	)		(2.1	)
Change in valuation allowance		(30.8	)		(27.2	)
Changes in tax rates		—			(1.4	)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Significant components of the Company’s deferred tax assets and liabilities as of April 30, 2015 and 2014 consist of the following (in thousands):

	As of April 30,
	2015			2014
Accrued liabilities	$	21		$	38
Depreciation and amortization		—			9
State taxes		1			1
Stock-based compensation expense		4,803			4,511
Capitalized research and development costs		433			556
Foreign net operating loss carry-forward		235			244
Net operating loss carry-forward		9,719			5,608
Total deferred tax assets		15,212			10,968
Less: Valuation allowance		(15,212	)		(10,968	)
Net deferred tax asset	$	—		$	—

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

The following table indicates the changes to the Company’s uncertain tax positions for the period and years ended April 30, 2015 and 2014 in thousands:

 

	Year Ended April 30,
	2015		2014
Balance, beginning of the year	$	—	$	—
Addition based on tax positions related to prior years		21		—
Addition based on tax positions related to current year		79		—
Balance, end of year	$	100	$	—