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

3 Months Ended

Jul. 31, 2018

Notes Tables

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

	As of July 31, 2018
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	4,084	$	-	$	-	$	4,084
Securities available-for-sale		18,870		-		-		18,870
	$	22,954	$	-	$	-	$	22,954

	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