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

9 Months Ended

Jan. 31, 2019

Notes Tables

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

	As of January 31, 2019
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	3,304	$	-	$	-	$	3,304
Securities available-for-sale		19,269		-		-		19,269
	$	22,573	$	-	$	-	$	22,573

	As of April 30, 2018
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	4,982	$	-	$	-	$	4,982
Securities available-for-sale		17,844		-		-		17,844
	$	22,826	$	-	$	-	$	22,826