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CAPITAL STOCK (Details 2) - USD ($)
 12 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Jul. 31, 2016
Share Transactions [Line Items]      
Credit Facility $ 483,829    
Reimbursable Expenses for Reno Creek Acquisition 483,829    
Acquisition     $ 1,226,875
Consulting Services 349,834 $ 1,107,937 1,372,381
Equity Financing   19,421,351 $ 8,365,037
Asset Acquisition   87,617  
Warrants Exercised 74,159 2,387,660  
Options Exercised (in shares)     0
Options Exercised 530,050 56,925 $ 225,115
Settlement of Liabilities 845,824 1,524,650 453,444
Shares Issued Under Stock Incentive Plan 1,711,579 1,584,394 726,244
Issuance Value [Member]      
Share Transactions [Line Items]      
Credit Facility 900,000 1,100,000 1,700,000
Reimbursable Expenses for Reno Creek Acquisition 483,829    
Consulting Services 349,834 1,107,937 1,372,381
Equity Financing   25,996,254 9,984,517
Asset Acquisition   87,617 1,226,875
Warrants Exercised 74,159 2,387,660  
Options Exercised 710,410 [1] 146,448 [2] 225,115
Settlement of Liabilities 845,824 1,524,650 453,444
Shares Issued Under Stock Incentive Plan $ 2,349,721 $ 946,252 $ 726,244
Common Stock [Member]      
Share Transactions [Line Items]      
Balance (in shares) 139,815,124 116,670,457 97,834,087
Reimbursable Expenses for Reno Creek Acquisition (in shares) 353,160    
Consulting Services (in shares) 225,168    
Warrants Exercised (in shares) 61,799    
Options Exercised (in shares) 1,094,589    
Settlement of Liabilities (in shares) 565,499    
Shares Issued Under Stock Incentive Plan (in shares) 1,664,285    
Balance (in shares) 161,175,764 139,815,124 116,670,457
Equity Financing [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share   $ 1.50 $ 0.85
Equity Financing [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share   $ 1.50 $ 0.85
Equity Financing [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Equity Financing (in shares)   17,330,836 12,364,704
Credit Facility [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.40 $ 1.49 $ 0.83
Credit Facility [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.40 $ 1.49 $ 1.20
Credit Facility [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Credit Facility (in shares) 641,574 738,503 1,711,933
Asset Acquisition [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share   $ 1.35 $ 0.92
Asset Acquisition [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share   $ 1.43 $ 0.92
Asset Acquisition [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Asset Acquisition (in shares)   61,939 1,333,560
Reno Creek Acquisition [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.30    
Reno Creek Acquisition [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.37    
Reno Creek Acquisition [Member] | Issuance Value [Member]      
Share Transactions [Line Items]      
Acquisition $ 20,332,617    
Reno Creek Acquisition [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Acquisition (in shares) 14,852,450    
North Reno Creek Acquisition [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.61    
North Reno Creek Acquisition [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.61    
North Reno Creek Acquisition [Member] | Issuance Value [Member]      
Share Transactions [Line Items]      
Acquisition $ 2,722,856    
North Reno Creek Acquisition [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Acquisition (in shares) 1,691,215    
Reimbursable Expenses for Reno Creek Acquisition [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.37    
Reimbursable Expenses for Reno Creek Acquisition [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.37    
Reimbursable Expenses for Reno Creek Acquisition [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Reimbursable Expenses for Reno Creek Acquisition (in shares) 353,160    
Diabase Acquisition [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.41    
Diabase Acquisition [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.41    
Diabase Acquisition [Member] | Issuance Value [Member]      
Share Transactions [Line Items]      
Acquisition $ 232,321    
Diabase Acquisition [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Acquisition (in shares) 164,767    
Consulting Services [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.19 $ 0.86 $ 0.72
Consulting Services [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.84 $ 1.64 $ 1.38
Consulting Services [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Consulting Services (in shares) 225,168 865,386 1,429,650
Advance Royalty Payment [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.34 $ 1.04  
Advance Royalty Payment [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.34 $ 1.04  
Advance Royalty Payment [Member] | Issuance Value [Member]      
Share Transactions [Line Items]      
Acquisition $ 61,820 $ 48,672  
Advance Royalty Payment [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Acquisition (in shares) 46,134 46,800  
Warrants Exercised [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.20 $ 1.20  
Warrants Exercised [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.20 $ 1.20  
Warrants Exercised [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Warrants Exercised (in shares) 61,799 1,989,717  
Options Exercised [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 0.45 [1] $ 0.45 [2] $ 0.33
Options Exercised [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.32 [1] $ 1.32 [2] $ 0.33
Options Exercised [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Options Exercised (in shares) 1,094,589 [1] 264,727 682,167
Settlement oft Liabilities [Member]      
Share Transactions [Line Items]      
Consulting Services (in shares) 565,499 351,061 487,574
Consulting Services $ 845,824 $ 454,195 $ 453,444
Settlement oft Liabilities [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.33 $ 1.03 $ 0.93
Settlement oft Liabilities [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.72 $ 1.54 $ 0.93
Settlement oft Liabilities [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Settlement of Liabilities (in shares) 565,499 1,015,940 487,574
Shares Issued Under Stock Incentive Plan [Member] | Minimum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.06 $ 0.88 $ 0.73
Shares Issued Under Stock Incentive Plan [Member] | Maximum [Member]      
Share Transactions [Line Items]      
Value per Share $ 1.77 $ 1.61 $ 1.08
Shares Issued Under Stock Incentive Plan [Member] | Common Stock [Member]      
Share Transactions [Line Items]      
Shares Issued Under Stock Incentive Plan (in shares) 1,664,285 830,819 826,782
[1] 580,624 options were exercised on a forfeiture basis resulting in 309,590 net shares issued.
[2] 309,634 options were exercised on a forfeiture basis resulting in 162,227 net shares issued.