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

6 Months Ended

Oct. 31, 2021

Notes Tables

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

	As of October 31, 2021
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	24,459	$	-	$	-	$	24,459
Equity securities		26,685		-		-		26,685
Available-for-sale fixed income securities		597		-		-		597
	$	51,741	$	-	$	-	$	51,741

	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