Fair Value Measurements (Tables)

12 Months Ended

Apr. 30, 2015

Fair Value Measurements [Abstract]

Schedule Of Fair Value, Assets And Liabilities Measured On Recurring Basis

				Fair Value Measurement Using
		Fair value		Level 1		Level 2		Level 3
Common stock warrant liability	$	195	$	-	$	-	$	195

Summary Of Activity Of Level 3 Inputs Measured On A Recurring Basis

(in thousands)		Common Stock Warrants
Balance at April 30, 2013	$	204
Change in fair value of common stock warrant liability		72
Balance at April 30, 2014		276
Change in fair value of common stock warrant liability		(81)
Balance at April 30, 2015	$	195