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Quarterly report pursuant to Section 13 or 15(d)

Nature of Operations and Liquidity (Liquidity) (Details)

v3.10.0.1
Nature of Operations and Liquidity (Liquidity) (Details) - USD ($)
12 Months Ended
Apr. 30, 2018
Jul. 31, 2018
Jul. 31, 2017
Debt Instrument [Line Items]      
Approximate cash position $ 14,612,559 $ 10,423,660 $ 6,213,569
Restricted cash 190,506 $ 190,506  
Secured Debt [Member]      
Debt Instrument [Line Items]      
Proceeds from shares issued $ 23,023,000    
Share price $ 7.15    
Sale of equity 3,220,000    
Repaid of loan $ 7,500,000