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

6 Months Ended

Oct. 31, 2023

Notes Tables

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

	As of October 31, 2023
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	3,427	$	-	$	-	$	3,427
Equity securities		13,064		-		-		13,064
Available-for-sale fixed income securities		42,406		500		-		42,906
	$	58,897	$	500	$	-	$	59,397

	As of April 30, 2023
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	7,240	$	-	$	-	$	7,240
Equity securities		14,546		-		-		14,546
Available-for-sale fixed income securities		39,178		750		-		39,928
	$	60,964	$	750	$	-	$	61,714