Quarterly report pursuant to Section 13 or 15(d)

Description of Business and Significant Accounting Policies - Reconciliation of the numerator and denominator used in computing basic and diluted net loss per share (Details)

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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 $)
3 Months Ended 12 Months Ended
Jul. 31, 2014
Jul. 31, 2013
Apr. 30, 2014
Apr. 30, 2013
Apr. 30, 2012
Basic net loss per share - net loss and weighted average common shares outstanding          
Loss (numerator) $ (759,767) $ (881,630) $ (2,609,000) $ (4,625,000) $ (3,259,000)
Shares (denominator) 2,410,512 1,754,662      
Net loss per share, basic $ (0.32) $ (0.50)      
Effect of dilutive securities          
Effect of dilutive securities - stock options 0 0      
Effect of dilutive securities - warrants 0 0      
Diluted net loss per share - net loss, weighted average common shares outstanding and effect of stock options and warrants          
Loss (numerator) $ (759,767) $ (881,630)      
Shares (denominator) 2,410,512 1,754,662      
Net loss per share, diluted $ (0.32) $ (0.50)