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

6 Months Ended

Oct. 31, 2020

Notes Tables

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

	As of October 31, 2020
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	7,983	$	-	$	-	$	7,983
Securities available-for-sale		29,485		-		-		29,485
	$	37,468	$	-	$	-	$	37,468

	As of April 30, 2020
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	2,115	$	-	$	-	$	2,115
Securities available-for-sale		29,204		-		-		29,204
	$	31,319	$	-	$	-	$	31,319