Note 10 - Stock Options and Incentive Plans (Tables)

12 Months Ended

Apr. 30, 2022

Notes Tables

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding at April 30, 2020		7,500,000		$	0.40
Forfeited during the year ended April 30, 2021		(50,000	)	$	0.40
Forfeited during the year ended April 30, 2022		(50,000	)	$	0.40
Total		7,400,000		$	0.40