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Description of Business and Significant Accounting Policies - Reconciliation of the numerator and denominator used in computing basic and diluted net loss per share (Details) (USD $)
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3 Months Ended | 9 Months Ended | ||
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Jan. 31, 2015
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Jan. 31, 2014
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Jan. 31, 2015
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Jan. 31, 2014
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| Basic net loss per share - net loss and weighted average common shares outstanding | ||||
| Loss (numerator) | $ (2,296,204)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ (846,786)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ (4,562,932)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ (2,066,608)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic |
| Shares (denominator) | 2,564,751us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 2,104,662us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 2,461,925us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 1,919,517us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
| Net loss per share, basic | $ (0.90)us-gaap_EarningsPerShareBasic | $ (0.40)us-gaap_EarningsPerShareBasic | $ (1.85)us-gaap_EarningsPerShareBasic | $ (1.08)us-gaap_EarningsPerShareBasic |
| Effect of dilutive securities | ||||
| Effect of dilutive securities - stock options | ||||
| Effect of dilutive securities - warrants | ||||
| Diluted net loss per share - net loss, weighted average common shares outstanding and effect of stock options and warrants | ||||
| Loss (numerator) | $ (2,296,204)us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ (846,786)us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ (4,562,932)us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ (2,066,608)us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted |
| Shares (denominator) | 2,564,751us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,104,662us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 2,461,925us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 1,919,517us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
| Net loss per share, diluted | $ (0.90)us-gaap_EarningsPerShareDiluted | $ (0.40)us-gaap_EarningsPerShareDiluted | $ (1.85)us-gaap_EarningsPerShareDiluted | $ (1.08)us-gaap_EarningsPerShareDiluted |
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- Definition
Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of stock options or restrictive stock units (RSUs). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of dilutive convertible securities excluding adjustments related to ESOP convertible preferred stock, stock options, and restrictive stock units. No definition available.
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- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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