Represents number of shares comprising one unit issued.

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Number of units issued during period.

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Number of warrants comprising one unit issued.

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The number of shares issued upon exercise of stock options on a forfeiture basis under share based payment arrangement.

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Number of share options (or share units) exercised during the current period on cash basis.

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Amount by which current fair value of underlying stock exceeds exercise price of unvested options outstanding.

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The number of shares forfeited during the period from stock options exercised on a forfeiture basis.

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Number of share options (or share units) exercised on a forfeiture basis during the current period.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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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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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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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Amount of cash inflow from exercise of option under share-based payment arrangement.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Price of a single share of a number of saleable stocks of a company.

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Per share or per unit amount of equity securities issued.

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Number of share options (or share units) exercised during the current period.

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Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Note 12 - Capital Stock (Details Textual) - USD ($)		3 Months Ended
Note 12 - Capital Stock (Details Textual) - USD ($)	Sep. 23, 2020	Oct. 31, 2020	Oct. 31, 2019	Jul. 31, 2020
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 1.92		$ 2.03
Share Price (in dollars per share)	$ 0.96
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)		28,500
Stock Issued During Period, Shares, Stock Options Exercised on Forfeiture Basis (in shares)		18,500
Share Based Compensation Arrangement by Share Based Payment Award, Shares Issued Upon Exercise of Options on a Forfeiture Basis (in shares)		3,532
Stock Forfeited During Period, Shares, Stock Options Exercised on Forfeiture Basis (in shares)		14,968
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises on Cash Basis (in shares)		10,000
Proceeds from Stock Options Exercised		$ 9,309
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		6,378
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value		11,020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value		5,510
Share-based Compensation Arrangement by Share-based Payment Award, Options, Unvested in Period, Intrinsic Value		5,510
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 1,763,358
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		1 year 91 days
Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 1,043,666
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		1 year 105 days
Share-based Payment Arrangement, Expense		$ 271,834	$ 66,928
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)		1,615,000		1,615,000
Performance-based Restriced Stock Units [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total		$ 201,808
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		1 year 3 days
Share-based Payment Arrangement, Expense		$ 37,544	$ 68,165
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)		333,750		333,750
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
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]
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