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

9 Months Ended

Jan. 31, 2020

Notes Tables

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

	As of January 31, 2020
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	2,739	$	-	$	-	$	2,739
Securities available-for-sale		25,845		-		-		25,845
	$	28,584	$	-	$	-	$	28,584

	As of April 30, 2019
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	5,617	$	-	$	-	$	5,617
Securities available-for-sale		21,828		-		-		21,828
	$	27,445	$	-	$	-	$	27,445