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Quarterly report pursuant to sections 13 or 15(d)

Stockholders' Equity (Schedule of Stock Option Activity) (Details)

v2.4.0.8
Stockholders' Equity (Schedule of Stock Option Activity) (Details) (USD $)
 3 Months Ended 6 Months Ended
Oct. 31, 2013
Jul. 31, 2013
Oct. 31, 2012
Jul. 31, 2012
Oct. 31, 2013
Stock Incentive Plan To Employees And Directors [Member]
          
Number of Shares          
Options Outstanding, beginning balance   7,344,381     7,344,381
Granted 327,500 1,536,211     1,863,711
Exercised           
Forfeited         (45,000)
Expired           
Options Outstanding, ending balance 9,163,092       9,163,092
Weighted Average Exercise Price          
Weighted Average Exercise Price Outstanding, Beginning   $ 0.35     $ 0.35
Granted         $ 0.35
Forfeited         $ 0.35
Weighted Average Exercise Price Outstanding, Ending $ 0.35       $ 0.35
Options Exercisable, Weighted Average Exercise Price $ 0.35 $ 0.35     $ 0.35
Options Exercisable, Weighted Average Remaining Contractual Life (Years)         4 years
Options Outstanding, Weighted Average Remaining Contractual Life (Years)         3 years 9 months 18 days
Weighted average grant-date fair value of stock options granted         $ 0.12
Options Exercisable, Aggregate Intrinsic Value            
Unrecognized compensation cost 509,425       509,425
Weighted average recognition period         4 years
Options granted fair value $ 39,300 $ 184,345      
Share based compensation related to employees 147,226 148,608 99,360 52,701  
Stock Incentive Plan To Employees And Directors [Member] | Two Year Prorata Vesting [Member]
          
Number of Shares          
Granted   200,000      
Weighted Average Exercise Price          
Vesting period   2 years      
Stock Incentive Plan To Employees And Directors [Member] | Three Year Prorata Vesting [Member]
          
Number of Shares          
Granted   545,000      
Weighted Average Exercise Price          
Vesting period   3 years      
Stock Incentive Plan To Employees And Directors [Member] | Seven Month Vesting [Member]
          
Number of Shares          
Granted   791,211      
Weighted Average Exercise Price          
Vesting period   7 months      
Stock Incentive Plan To Non Employees [Member]
          
Number of Shares          
Options Outstanding, beginning balance   270,000     270,000
Granted           
Exercised           
Forfeited           
Expired           
Options Outstanding, ending balance 270,000       270,000
Weighted Average Exercise Price          
Weighted Average Exercise Price Outstanding, Beginning   $ 0.35     $ 0.35
Granted           
Forfeited           
Weighted Average Exercise Price Outstanding, Ending $ 0.35       $ 0.35
Options Outstanding, Weighted Average Remaining Contractual Life (Years)         3 years 7 months 6 days
Options Exercisable, shares 58,333       58,333
Share based compensation related to non-employees         $ 1,496