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STOCK BASED COMPENSATION (Details Narrative) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 01, 2021 $ / shares shares | Oct. 30, 2020 $ / shares shares | May 08, 2018 $ / shares shares | Oct. 31, 2018 Days $ / shares shares | Jul. 31, 2021 USD ($) $ / shares shares | Jul. 31, 2020 USD ($) shares | Jul. 31, 2021 USD ($) $ / shares shares | Jul. 31, 2020 USD ($) shares | Mar. 25, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option compensation to employees and directors | $ |  |  |  |  |  |  | $ 4,803,515 | $ 3,016,305 |
Weighted average exercise per share | $ / shares |  |  |  |  |  |  | $ 2.58 |  |
Stock options exercised, shares |  |  |  |  |  |  | 44,000 |  |
Stock options exercised | $ |  |  |  |  |  | $ 18,540 | $ 293,604 | 122,270 |
Proceeds from stock plans | $ |  |  |  |  |  |  | $ 3,000 | 15,452 |
Warrant [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  | 5 months |  |  |  |  |  |  |
Class of Warrant or Right, Date from which Warrants or Rights Exercisable |  | Oct. 30, 2025 |  |  |  |  |  |  |
[custom:WarrantsPurchaseOfCommonStock-0] |  | 60,000 |  |  |  |  |  |  |
Warrant exercise price | $ / shares |  | $ 2.06 |  |  | $ 5.03 |  | $ 5.03 |  |
[custom:ConsultingExpense] | $ |  |  |  |  |  |  | $ 96,000 | $ 0 |
Warrants to purchase common stock |  |  |  |  | 500,000 |  | 500,000 |  |
Warrants maturity date |  |  |  |  | Nov. 30, 2021 |  | Nov. 30, 2021 |  |
Warrants issued |  |  |  |  |  | 0 |  | 0 |
Warrant [Member] | Public Offering [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Warrant exercise price | $ / shares |  |  |  |  |  |  |  |  | $ 6.5625
Warrants to purchase common stock |  |  |  |  |  |  |  |  | 300,000
Warrants maturity date |  |  |  |  |  |  |  |  | Mar. 22, 2026
2018 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted average exercise per share | $ / shares |  |  |  |  |  |  | $ 3.81 |  |
Shares options, granted |  |  |  |  |  |  | 4,370,000 | 800,000 |
Stock options exercised, shares |  |  |  |  |  |  | 33,888 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  |  |  |  | 1,257,937 |  | 1,257,937 |  |
Equity Option [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Option to purchase common stock |  |  |  |  | 0 | 0 | 107,451 | 107,451 |
Stock options exercised, shares |  |  |  |  | 7,200 | 7,200 | 51,100 | 51,100 |
Stock options exercised | $ |  |  |  |  | $ 0 | $ 19,000 | $ 294,000 | $ 122,000 |
Shares withheld on a cashless exercise |  |  |  |  |  |  | 7,937 | 7,937 |
Equity Option [Member] | 2018 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Shares options, granted | 100,000 |  |  |  |  |  |  |  |
Market Conditions Stock Option [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option compensation to employees and directors | $ |  |  |  |  | 1,981,000 |  |  |  |
Non Vested Stock Option [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option compensation to employees and directors | $ |  |  |  |  | 4,528,000 |  |  |  |
Share-based Payment Arrangement, Tranche One [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Option to purchase common stock |  |  |  | 500,000 |  |  |  |  |
Weighted average exercise per share | $ / shares |  |  |  | $ 5.00 |  |  |  |  |
Consecutive trading days | Days |  |  |  | 20 |  |  |  |  |
Minimum [Member] | Equity Option [Member] | 2018 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted average exercise per share | $ / shares | $ 5.00 |  |  |  |  |  |  |  |
Maximum [Member] | Equity Option [Member] | 2018 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted average exercise per share | $ / shares | $ 8.00 |  |  |  |  |  |  |  |
Shares options, granted | 2,000,000 |  |  |  |  |  |  |  |
Employees and Directors [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option compensation to employees and directors | $ |  |  |  |  | 1,066,000 | 997,000 | $ 2,822,000 | $ 3,016,000 |
Employees and Directors [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  | 1 year |  |
Employees and Directors [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  | 4 years |  |
Chairman, President and Chief Executive Officer [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Option to purchase common stock |  |  | 1,500,000 |  |  |  |  |  |
Expiration date |  |  | May 31, 2021 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate |  |  |  |  |  |  | 1.62% |  |
Chairman, President and Chief Executive Officer [Member] | Market Conditions Stock Option [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Shares options, granted |  |  |  |  |  |  | 4.02 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term |  |  |  |  |  |  | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate |  |  |  |  |  |  | 75.00% |  |
Chairman, President and Chief Executive Officer [Member] | Restricted Stock [Member] | 2018 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Option to purchase common stock |  |  | 1,500,000 |  |  |  |  |  |
Weighted average exercise per share | $ / shares |  |  | $ 11.00 |  |  |  |  |  |
Expiration date |  |  | May 31, 2021 |  |  |  |  |  |
Chairman, President and Chief Executive Officer [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted average exercise per share | $ / shares |  |  | $ 5.00 |  |  |  |  |  |
Service period |  |  | 3 months |  |  |  |  |  |
Chairman, President and Chief Executive Officer [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted average exercise per share | $ / shares |  |  | $ 8.00 |  |  |  |  |  |
Service period |  |  | 7 months |  |  |  |  |  |
Consultants [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option compensation to employees and directors | $ |  |  |  |  | $ 139,000 | $ 45,000 | $ 326,000 | $ 157,000 |
Employees and Consultants [Member] | 2018 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Shares options, granted |  |  |  |  | 2,990,000 | 0 | 4,370,000 | 800,000 |
Employees and Consultants [Member] | Minimum [Member] | 2018 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Exercise price | $ / shares |  |  |  |  | $ 2.83 |  | $ 2.83 |  |
Employees and Consultants [Member] | Maximum [Member] | 2018 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Exercise price | $ / shares |  |  |  |  | $ 5.30 |  | $ 5.30 |  |
Employees [Member] | Employee Stock Purchase Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Option to purchase common stock |  |  |  |  |  |  | 1,634 | 9,618 |
Purchase price of common stock percentage |  |  |  |  |  |  | 85.00% |  |
Proceeds from stock plans | $ |  |  |  |  |  |  | $ 3,000 | $ 15,000 |

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