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CAPITAL STOCK (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jan. 20, 2017
Apr. 30, 2017
Jan. 31, 2017
Oct. 31, 2016
Apr. 30, 2017
Capital Stock [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value   $ 1,498,281     $ 1,498,281
Share Price $ 1.54        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross         622,500
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value - Unvested         $ 324,278
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value   $ 1,174,003     1,174,003
Stock Issued During Period, Value, Stock Options Exercised         54,600
Stock Issued During Period, Value, New Issues         19,421,351
Number Of Warrants Issued 9,571,929        
Number Of Warrants To Be Issued 9,571,934        
Employee Stock Option [Member]          
Capital Stock [Line Items]          
Stock issued during period, shares, stock options exercised   47,500 144,634 180,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   100,000 150,000 372,500  
Warrant [Member]          
Capital Stock [Line Items]          
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 2.00        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 8,665,413        
Warrant Expiration Term 3 years        
Warrants Expiration Period 6 months        
Agents [Member] | Warrant [Member]          
Capital Stock [Line Items]          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 906,516        
2014 Shelf Offering [Member]          
Capital Stock [Line Items]          
Available Offering Stock Value     $ 100,000,000    
Over-Allotment Option [Member]          
Capital Stock [Line Items]          
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 2.00        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 906,516        
2017 Shelf [Memeber]          
Capital Stock [Line Items]          
Available Offering Stock Value   $ 100,000,000     $ 100,000,000
Equity Financing [Member]          
Capital Stock [Line Items]          
Stock Issued During Period, Shares, New Issues 17,330,836        
Shares Issued, Price Per Share $ 1.50        
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 2.00        
Stock Issued During Period, Value, New Issues $ 25,996,254        
Warrants Expiration Period 3 years        
2015 Stock Incentive Plan [Member]          
Capital Stock [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   7,225,722     7,225,722
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross         10,467,134
2016 Stock Incentive Plan [Member]          
Capital Stock [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized         1,200,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total   $ 270,751     $ 270,751
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition         7 months 17 days
2016 Stock Incentive Plan [Member] | Employee Stock Option [Member]          
Capital Stock [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized         18,892,856
Forfeiture Basis One [Member] | Employee Stock Option [Member]          
Capital Stock [Line Items]          
Stock issued during period, shares, stock options exercised         100,000
Stock Issued During Period, Shares, Share-based Compensation, Forfeited         46,875
Stock Issued During Period, Value, Share-based Compensation, Forfeited         $ 21,094
Forfeiture Basis One [Member] | Issuance One [Member] | Employee Stock Option [Member]          
Capital Stock [Line Items]          
Stock issued during period, shares, stock options exercised         53,125
Stock Issued During Period, Value, Stock Options Exercised         $ 23,906
Forfeiture Basis Two [Member] | Employee Stock Option [Member]          
Capital Stock [Line Items]          
Stock issued during period, shares, stock options exercised         142,134
Stock Issued During Period, Shares, Share-based Compensation, Forfeited         57,584
Stock Issued During Period, Value, Share-based Compensation, Forfeited         $ 26,624
Forfeiture Basis Two [Member] | Issuance Two [Member] | Employee Stock Option [Member]          
Capital Stock [Line Items]          
Stock issued during period, shares, stock options exercised         84,550
Stock Issued During Period, Value, Stock Options Exercised         $ 38,537
Forfeiture Basis Three [Member] | Employee Stock Option [Member]          
Capital Stock [Line Items]          
Stock issued during period, shares, stock options exercised         30,000
Stock Issued During Period, Shares, Share-based Compensation, Forfeited         16,625
Stock Issued During Period, Value, Share-based Compensation, Forfeited         $ 15,461
Forfeiture Basis Three [Member] | Issuance Three [Member] | Employee Stock Option [Member]          
Capital Stock [Line Items]          
Stock issued during period, shares, stock options exercised         13,375
Stock Issued During Period, Value, Stock Options Exercised         $ 12,439