Note 12 - Stock Repurchase Program (Tables)

6 Months Ended

Oct. 31, 2021

Notes Tables

Class of Treasury Stock [Table Text Block]

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs		Approximate Dollar Value of Shares That May Yet Be Purchased Under the Plans or Programs
Shares purchased in prior periods		2,933,415	$	0.37		2,933,415	$	2,911
Quarter ended October 31, 2020 (a)		152,915	$	0.50		152,915	$	2,835
Quarter ended January 31, 2021 (a)		-	$	-		-	$	2,835
Quarter ended April 30, 2021 (a)		17,303	$	0.65		17,303	$	2,823
Quarter ended July 31, 2021 (a)		-	$	-		-	$	2,823
Quarter ended October 31, 2021 (a)		6,290	$	0.62		6,290	$	2,819
Total		3,109,923	$	0.38		3,109,923