Note 1 - Organization and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Jan. 31, 2022

Notes Tables

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

	As of January 31, 2022
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	29,081	$	-	$	-	$	29,081
Equity securities		27,316		-		-		27,316
Available-for-sale fixed income securities		597		-		-		597
	$	56,994	$	-	$	-	$	56,994

	As of April 30, 2021
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	18,209	$	-	$	-	$	18,209
Equity securities		23,582		-		-		23,582
Available-for-sale fixed income securities		2,600		-		-		2 ,600
	$	44,391	$	-	$	-	$	44,391