Provision for Income Taxes (Tables)

12 Months Ended

Apr. 30, 2013

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, 2013
	Federal		State		Foreign		Total
Current	$	-	$	2	$	8	$	10
Deferred		(2,258)		(196)		-		(2,454)
Change in valuation allowance		2,258		196		-		2,454
Total	$	-	$	2	$	8	$	10

	Year Ended April 30, 2012
	Federal		State		Foreign		Total
Current	$	-	$	1	$	(3)	$	(2)
Deferred		(2,523)		(172)		(68)		(2,763)
Change in valuation allowance		2,523		172		68		2,763
Total	$	-	$	1	$	(3)	$	(2)

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, 2013 and 2012 is as follows:

	Year Ended April 30,
	2013			2012
Federal income tax at statutory rate		34.0	%		34.0	%
State income tax, net of federal benefit		2.6			2.3
Permanent differences		(0.5)			1.5
Other		1.6			(3.0)
Change in valuation allowance		(39.6)			(31.9)
Changes in tax rates		1.7			(2.9)
Income tax expense		(0.2)	%		-	%

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, 2013 and 2012 consist of the following (in thousands):

	As of April 30,
	2013		2012
Accrued liabilities	$	89	$	62
Depreciation and amortization		51		80
State taxes		7		5
Stock-based compensation expense		3,582		2,685
Capitalized research and development costs		688		798
Foreign net operating loss carry-forward		365		265
Net operating loss carry-forward		4,144		2,478
Total deferred tax assets		8,926		6,373
Less: Valuation allowance		(8,926)		(6,373)
Net deferred tax asset	$	-	$	-