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Provision for Income Taxes (Tables) | 12 Months Ended
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Apr. 30, 2014
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, 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 |
|  | 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 |
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, 2014 and 2013 is as follows:
|  | Year Ended April 30, |
|  | 2014 |  | 2013 |
Federal income tax at statutory rate |  |  | 34.0 | % |  | 34.0 | %
State income tax, net of federal benefit |  |  | 2.1 |  |  | 2.6 |
Permanent differences |  |  | (5.6) |  |  | (0.5) |
Other |  |  | (2.1) |  |  | 1.6 |
Change in valuation allowance |  |  | (27.2) |  |  | (39.6) |
Changes in tax rates |  |  | (1.4) |  |  | 1.7 |
Income tax expense |  |  | (0.2) | % |  | (0.2) | %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] | Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred tax assets and liabilities as of April 30, 2014 and 2013 consist of the following (in thousands):
Accrued liabilities |  | $ | 38 |  | $ | 89 |
Depreciation and amortization |  |  | 9 |  |  | 51 |
State taxes |  |  | 1 |  |  | 7 |
Stock-based compensation expense |  |  | 4,511 |  |  | 3,582 |
Capitalized research and development costs |  |  | 556 |  |  | 688 |
Foreign net operating loss carry-forward |  |  | 244 |  |  | 386 |
Net operating loss carry-forward |  |  | 5,608 |  |  | 4,144 |
Total deferred tax assets |  |  | 10,968 |  |  | 8,948 |
Less: Valuation allowance |  |  | (10,968) |  |  | (8,948) |
Net deferred tax asset |  | $ | - |  | $ | - |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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