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Note 16 - Share Based Awards (Tables)

9 Months Ended

Jan. 31, 2022

Share-based Payment Arrangement [Abstract]

Schedule of Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities [Table Text Block]

Exercise price			1.69 - 2.52
Stock price on date of grant			1.69 - 2.33
Volatility			268.51% - 270.18%
Risk-free interest rate			1.50% - 1.74%
Expected term (years)			8.25 – 8.25
Dividend yield			—

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

Options		Shares				Weighted-Average Exercise Price				Weighted-Average Remaining Contractual Term				Aggregate Intrinsic Value
Outstanding as of April 30, 2020			1,597,475			$	1.10
Granted			600,000				3.63
Exercised			—				—
Forfeited or expired			—				—
Outstanding as of April 30, 2021			2,197,475				1.79
Granted			1,656,000				2.59
Exercised			(112,500	)			0.96
Forfeited or expired			(26,000	)			2.12
Outstanding as of January 31, 2022			3,714,975				2.17				8.72			$	1,010,178
Exercisable as of January 31, 2022			1,897,142			$	2.13				8.01			$	687,111

Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table Text Block]

		Three months ended January 31,								Nine months ended January 31,
		2022				2021				2022				2021
General and administrative		$	343,549			$	336,301			$	952,899			$	525,559
Research and development			143,279				179,157				284,511				199,047
Operations			182,320				170,612				556,928				175,586
Sales and marketing			112,975				168,125				271,808				168,125
Total		$	782,123			$	854,195			$	2,066,146			$	1,068,317

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Tabular disclosure of share-based payment arrangement.

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Tabular disclosure of all information related to the key inputs and assumptions used in measuring the fair value of assets obtained or liabilities incurred, as the result of a sale of financial assets, relating to the transferor's continuing involvement, if any, at the time of securitization, asset-backed financing arrangement, or similar transfer (including at a minimum, but not limited to, and if applicable, quantitative information about discount rates, expected prepayments including the expected weighted-average life of prepayable financial assets, and anticipated credit losses, including expected static pool losses).

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Tabular disclosure of an equity-based arrangement (such as stock or unit options and stock or unit awards) with an individual employee, which is generally an employment contract between the entity and a selected officer or key employee containing a promise by the employer to pay certain equity-based awards at future dates, sometimes including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period, the number of shares or units issued during the period under such arrangements, and the carrying amount as of the balance sheet date of the related liability.

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