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

9 Months Ended

Jan. 31, 2018

Notes Tables

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

	As of January 31, 2018
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	3,716	$	-	$	-	$	3,716
Securities available-for-sale		18,404		-		-		18,404
	$	22,120	$	-	$	-	$	22,120

	As of April 30, 2017
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	6,066	$	-	$	-	$	6,066
Securities available-for-sale		16,576		-		-		16,576
	$	22,642	$	-	$	-	$	22,642