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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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Per share or per unit amount of equity securities issued.

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Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
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Data Type:	na
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Note 13 - Capital Stock (Details Textual) - USD ($)		2 Months Ended	12 Months Ended
Note 13 - Capital Stock (Details Textual) - USD ($)	Oct. 03, 2018	Sep. 30, 2020	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Shares Issued, Price Per Share (in dollars per share)				$ 1.33
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 2.03	$ 1.94	$ 1.97	$ 1.78
Share Price (in dollars per share)	$ 1.54
Number of Warrants Exchanged for Common Shares (in shares)				11,000,000
Stock Issued During the Period, Shares, Issued in Exchange for Warrants (in shares)				750,000
Class of Warrant or Right Cancelled, Weighted Average Exercise Price (in dollars per share)				$ 2.30
Warrants, Carrying Value Per Share (in dollars per share)				$ 0.45
Carrying Value of Warrants				$ 4,950,000
Fair Value Common Shares Issued for Warrants Exchanged				997,500
Proceeds from Warrant Exercises				$ 4,822,357
Class of Warrant or Right, Exercised During Period (in shares)				3,999,881
Class of Warrant or Right, Exercised During Period, Exercise Price (in dollars per share)				$ 1.21
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)			6,163,900	2,006,350	4,083,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value			$ 391,508
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value			95,261
Share-based Compensation Arrangement by Share-based Payment Award, Options, Unvested in Period, Intrinsic Value			296,247
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total			1,122,917	$ 1,361,944	$ 1,711,579
Share Issuance Obligation Amount			$ 103,554	$ 187,100
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)			4,838,900	2,006,350	4,083,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)			2 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 2,500,153
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 113 days
Share-based Payment Arrangement, Option [Member] \| Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)			90 days
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			12.50%
Share-based Payment Arrangement, Option [Member] \| Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)			180 days
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			12.50%
Share-based Payment Arrangement, Option [Member] \| Share-based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)			1 year
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			25.00%
Share-based Payment Arrangement, Option [Member] \| Share-based Compensation Award, Tranche Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)			1 year 180 days
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			25.00%
Share-based Payment Arrangement, Option [Member] \| Share-based Compensation Award, Tranche Five [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)			2 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			25.00%
Performance Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)			1,325,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)			3 years
Performance Stock Option [Member] \| Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			33.33%
Performance Stock Option [Member] \| Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage				33.33%
Performance Stock Option [Member] \| Share-based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage				33.33%
Options Granted during Fiscal 2020 and 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)			10 years
Options Granted during Fiscal 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)			5 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)			3 years	3 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 1,315,500
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 175 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			1,305,000	465,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)			$ 0.91	$ 0.9421
Share-based Payment Arrangement, Expense			$ 310,127	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)			155,000
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)			105,844
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited (in shares)			49,156
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)			1,615,000	465,000
Restricted Stock Units (RSUs) [Member] \| Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			50.00%	33.33%
Restricted Stock Units (RSUs) [Member] \| Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			16.67%	33.33%
Restricted Stock Units (RSUs) [Member] \| Share-based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			16.67%	33.33%
Restricted Stock Units (RSUs) [Member] \| Share-based Compensation Award, Tranche Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			16.67%
Performance-based Restriced Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Month)				3 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 239,352
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			2 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)				445,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)				$ 1.15
Share-based Payment Arrangement, Expense			$ 272,658	$ 0	$ 0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)			90,001
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)			333,750	445,000
Performance-based Restriced Stock Units [Member] \| Minimum [Member]
Share-based Compensation Arrangement By Share-based Payment Award, Percentage Eligible to Vest				0.00%
Performance-based Restriced Stock Units [Member] \| Maximum [Member]
Share-based Compensation Arrangement By Share-based Payment Award, Percentage Eligible to Vest				200.00%
The 2018 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)			0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)					398,839
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total					$ 510,527
Share Issuance Obligation Amount					$ 638,142
The 2019 Stock Incentive Plan [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)			188,914
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total			$ 171,911
Share Issuance Obligation Amount			$ 187,100
October 2018 Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)	1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 2.05
Warrants and Rights Outstanding, Term (Month)	2 years 180 days
Subsequent Event [Member] \| Warrant Issued with September 2020 Offering [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)		1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 1.80
Warrants and Rights Outstanding, Term (Month)		2 years
Subsequent Event [Member] \| Warrant Issued to Agents [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 1.80
Warrants and Rights Outstanding, Term (Month)		2 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		583,333
September 2020 Offering [Member] \| Subsequent Event [Member]
Number of Units Issued During Period (in shares)		12,500,000
Shares Issued, Price Per Share (in dollars per share)		$ 1.20
Proceeds from Issuance or Sale of Equity, Total		$ 15,000,000
Number of Shares per Unit Issued (in shares)		1
Number of Warrants per Unit (in shares)		0.5
The 2018 October Offering [Member]
Number of Units Issued During Period (in shares)	12,613,049
Shares Issued, Price Per Share (in dollars per share)	$ 1.60
Proceeds from Issuance or Sale of Equity, Total	$ 20,180,878
Number of Shares per Unit Issued (in shares)	1
Number of Warrants per Unit (in shares)	0.5
Over-Allotment Option [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 2.05
Warrants and Rights Outstanding, Term (Month)	2 years 180 days
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	756,782