Organization and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Jul. 31, 2014

Organization, Consolidation and Presentation Of Financial Statements [Abstract]

Schedule of levels of fair value measurements of investments

	As of July 31, 2014
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	6,466	$	-	$	-	$	6,466
Securities available-for-sale		9,095		-		-		9,095
	$	15,561	$	-	$	-	$	15,561

	As of April 30, 2014
($ in thousands)	Level 1		Level 2		Level 3		Total
Cash equivalents	$	5,482	$	-	$	-	$	5,482
Securities available-for-sale		9,226		-		-		9,226
	$	14,708	$	-	$	-	$	14,708