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Share-Based Compensation (Tables)

9 Months Ended

Jan. 31, 2022

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

Schedule of Valuation Assumptions

 Schedule of Valuation Assumptions

		Nine months ended January 31,
		2022				2021
Risk-free interest rate			1.5	%			6.0	%
Expected dividend yield			—	%			—	%
Expected life (in years)			5.6				5.9
Expected volatility			121.9	%			136.5	%

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, 2021			516,827			$	3.89				9.0
Granted			793,850			$	1.43
Exercised			(44,332	)		$	1.05
Expired			(1,806	)		$	32.62
Cancelled/forfeited			(121,383	)		$	3.03
Outstanding as of January 31, 2022			1,143,156			$	2.34				9.4
Exercisable as of January 31, 2022			308,481			$	4.59				8.1

Schedule of Business Acquisition and Fair Value of Net Assets, Compensation Expense Recognized

 Schedule of Business Acquisition and Fair Value of Net Assets, Compensation Expense Recognized

Fair Value of Purchase		$	1,161,267
Total Acquired Assets		$	(593,571	)
Total Acquired Liabilities		$	117,106
Compensation Expense		$	684,802
Quarterly Compensation Expense		$	171,201

Schedule of Non-vested Restricted Stock Activity

A summary of non-vested restricted stock under our stock incentive plans is as follows:

 Schedule of Non-vested Restricted Stock Activity

		Number of Shares				Weighted Average Price per Share
Issued and unvested at April 30, 2021			10,000			$	2.93
Granted			777,764			$	1.42
Vested			(10,000	)		$	2.93
Cancelled/forfeited			—			$	—
Issued and unvested at January 31, 2022			777,764			$	1.42

Performance Stock Options [Member]

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

Schedule of Stock Option Activity

Schedule of Stock Option Activity

		Shares Underlying Options				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (In Years)
Outstanding as of April 30, 2021			424,790			$	2.57				9.5
Granted			66,667			$	0.62
Exercised			(40,668	)		$	1.05
Cancelled/forfeited			(220,766	)		$	2.58
Outstanding as of January 31, 2022			230,023			$	2.26				9.1
Exercisable as of January 31, 2022			—								0.0

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