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

3 Months Ended

Jul. 31, 2017

Notes Tables

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

	As of July 31, 2017
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	6,217	$	-	$	-	$	6,217
Securities available-for-sale		17,710		-		-		17,710
	$	23,927	$	-	$	-	$	23,927

	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