Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Warrant Derivative Liability (Activity in Level 3) (Details)

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Fair Value Measurements - Warrant Derivative Liability (Activity in Level 3) (Details)
9 Months Ended
Jan. 31, 2017
USD ($)
Fair Value Measurements - Warrant Derivative Liability Activity In Level 3 Details  
Balance April 30, 2016
Initial valuation in valuation of warrant derivative liability 52,500
Change in valuation of warrant derivative liability
Balance October 31, 2016 $ 52,500