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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 maximum amount of proceeds can be raised from the stock offering.

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Number of warrants or rights outstanding.

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

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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 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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Number of new stock issued during the period.

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Note 13 - Capital Stock (Details Textual) - USD ($) $ in Thousands		2 Months Ended	3 Months Ended		6 Months Ended
	Mar. 10, 2023	Mar. 10, 2023	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022	Nov. 16, 2022	Oct. 31, 2022	Jul. 31, 2022	Nov. 26, 2021	May 17, 2021	May 14, 2021
Class of Warrant or Right, Outstanding (in shares)			4,792,586		4,792,586			4,837,586	3,615,454
Proceeds from Warrant Exercises					$ 6,205
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value			$ 20,628		20,628
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value			18,684		18,684
Share-based Compensation Arrangement by Share-based Payment Award, Options, Unvested in Period, Intrinsic Value			1,944		1,944
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			1,519		$ 1,519
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					11 months 26 days
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total				$ 1,163		$ 1,163
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					1 year 6 months 7 days
Share-Based Payment Arrangement, Expense			$ 293	189	$ 586	378
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)			836,034		836,034
Performance-based Restriced Stock Units [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 782		$ 782				$ 981
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)					1 year 11 months 4 days
Share-Based Payment Arrangement, Expense			$ 99	$ 73	$ 198	$ 147
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)			734,582		734,582				734,582
Replacement Warrants [Member]
Class of Warrant or Right, Outstanding (in shares)			4,585,768		4,585,768
Shelf 2021 [Member]
Stock Offering, Maximum Amount										$ 200,000	$ 200,000
May 17, 2021 At-the-market Offering [Member]
Stock Offering, Maximum Amount											$ 100,000
May 14, 2021 At-the-market Offering [Member]
Stock Offering, Maximum Amount												$ 100,000
Stock Issued During Period, Shares, New Issues (in shares)			982,663		6,201,553
Proceeds from Issuance of Common Stock, Net			$ 3,811		$ 25,526
November 2021 At-the-market Offering [Member]
Stock Offering, Maximum Amount										$ 100,000
Shelf 2022 [Member]
Stock Offering, Maximum Amount							$ 300,000
November 2022 At-the-market Offering [Member]
Stock Offering, Maximum Amount							$ 300,000
Stock Issued During Period, Shares, New Issues (in shares)			6,057,700
Proceeds from Issuance of Common Stock, Net			$ 22,295
November 2022 At-the-market Offering [Member] \| Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)		1,780,000
Proceeds from Issuance of Common Stock, Net	$ 6,991