Cash fees percentage.

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Stock issued during period shares stock warrants exercised.

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Stock issued during the period warrant exercise.

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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 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 expense classified as other.

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The cash outflow to reacquire common stock during the period.

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The cash inflow associated with the amount received from entity's first offering of stock to the public.

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The cash inflow from the additional capital contribution to the entity.

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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 cash inflow associated with the amount received from holders exercising their stock warrants.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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Number of new stock issued during the period.

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Stockholders’ Equity (Details Narrative) - USD ($)					12 Months Ended
Stockholders’ Equity (Details Narrative) - USD ($)	Apr. 16, 2021	Jan. 25, 2021	Aug. 19, 2020	Oct. 10, 2019	Jul. 31, 2022	Jul. 31, 2021	Oct. 31, 2022
Subsidiary, Sale of Stock [Line Items]
Shares price, per share		$ 119.90
Proceeds from stock options exercised					$ 202,800	$ 636,993
Proceeds from warrant exercises						4,792,951
Net proceeds from common stock						$ 57,004,412
China Grand Pharmaceutical & Healthcare Holdings Ltd [Member]
Subsidiary, Sale of Stock [Line Items]
Sale of stock	64,084	154,054	90,864
Proceeds from warrant exercises	$ 4,800,000
Warrant exercise price per share	$ 75.90
Stock Purchase Agreements [Member]
Subsidiary, Sale of Stock [Line Items]
Purchase price of common stock				$ 30,000,000.0
Net proceeds from common stock				$ 28,000,000.0
Stock Purchase Agreements [Member] \| China Grand Pharmaceutical & Healthcare Holdings Ltd [Member]
Subsidiary, Sale of Stock [Line Items]
Sale of stock number of shares issued				454,545
Stock Purchase Agreements [Member] \| Sirtex Medical US Holdings Inc [Member]
Subsidiary, Sale of Stock [Line Items]
Sale of stock number of shares issued				90,909
Common Stock [Member]
Subsidiary, Sale of Stock [Line Items]
Sale of stock		350,513	209,481			209,481
Shares price, per share		$ 119.90	$ 71.50
Stock issued during period shares stock options exercised					5,909	17,153
Proceeds from stock options exercised					$ 200,000	$ 600,000
Stock issued during period shares warrants exercised						63,148
Proceeds from warrant exercises						$ 4,800,000
Common Stock [Member] \| China Grand Pharmaceutical & Healthcare Holdings Ltd [Member]
Subsidiary, Sale of Stock [Line Items]
Proceeds from warrant exercises						$ 4,800,000
Warrant exercise price per share						$ 75.90
Stock issued during the period warrant exercise						64,084
Common Stock [Member] \| Sirtex Medical US Holdings Inc [Member]
Subsidiary, Sale of Stock [Line Items]
Proceeds from warrant exercises						$ 1,000,000.0
Warrant exercise price per share						$ 75.90
Stock issued during the period warrant exercise						12,817
Warrant [Member]
Subsidiary, Sale of Stock [Line Items]
Stock issued during period shares warrants exercised						(63,148)
Number of warrant to purchase shares of common stock					77,554		75,897
Warrant [Member] \| Minimum [Member]
Subsidiary, Sale of Stock [Line Items]
Warrant exercise price per share					$ 75.90		$ 75.90
Warrant [Member] \| Maximum [Member]
Subsidiary, Sale of Stock [Line Items]
Warrant exercise price per share					$ 369.60		$ 275.00
Warrant Exercise [Member] \| Third Party Investors [Member]
Subsidiary, Sale of Stock [Line Items]
Stock issued during the period warrant exercise						63,148
January 2021 Offering [Member]
Subsidiary, Sale of Stock [Line Items]
Sale of stock		350,513
Shares price, per share		$ 119.90
Gross proceeds		$ 42,000,000.0
Net proceeds		$ 39,100,000
Cash fees percentage		6.00%
Other expenses		$ 400,000
August 2020 Offering [Member]
Subsidiary, Sale of Stock [Line Items]
Sale of stock			209,481
Shares price, per share			$ 71.50
Gross proceeds			$ 15,000,000.0
Net proceeds			$ 13,500,000
Cash fees percentage			8.00%
Other expenses			$ 300,000