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Share-Based Compensation (Tables)

9 Months Ended

Jan. 31, 2023

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Schedule of Valuations Assumptions

 Schedule of Valuations Assumptions

		Nine months ended January 31,
		2023				2022
Risk-free interest rate			3.5	%			1.5	%
Expected dividend yield			0	%			0	%
Expected life (in years)			5.5				5.6
Expected volatility			109.0	%			121.9	%

Schedule of Stock Option Activity

A summary of stock options under our Stock Incentive Plans is detailed in the following table.

 Schedule of Stock Option Activity

			Shares Underlying  Options				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (In Years)
Outstanding as of April 30, 2022				1,110,356			$	2.34				9.2
Granted				601,089			$	0.68
Exercised				—			$	—
Cancelled/forfeited				(135,903	)		$	1.88
Outstanding as of January 31, 2023				1,575,542			$	1.75				9.0
Exercisable as of January 31, 2023				540,546			$	3.19				7.9

Schedule of Non-vested Restricted Stock Activity

A summary of non-vested restricted stock units under our Stock Incentive Plans is as follows:

 Schedule of Non-vested Restricted Stock Activity

		Number of Shares				Weighted Average Price per Share
Unvested at April 30, 2022			827,764			$	1.41
Granted			1,608,681			$	0.77
Vested and issued			(349,429	)		$	1.40
Cancelled/forfeited			(49,021	)
Unvested at January 31, 2023			2,037,995			$	0.91

Performance Stock Options [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Schedule of Stock Option Activity

A summary of performance stock options under our Stock Incentive Plans is detailed in the following table.

 Schedule of Stock Option Activity

			Shares Underlying Options				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (In Years)
Outstanding as of April 30, 2022				210,122			$	2.20				8.8
Granted				—			$	—
Exercised				—			$	—
Cancelled/forfeited				(8,466	)		$	2.93
Outstanding as of January 31, 2023				201,656			$	2.17				8.1
Exercisable as of January 31, 2023				—			$	—

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- Definition

Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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