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

6 Months Ended

Oct. 31, 2019

Notes Tables

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

	As of October 31, 2019
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	3,955	$	-	$	-	$	3,955
Securities available-for-sale		21,690		-		-		21,690
	$	25,645	$	-	$	-	$	25,645

	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