Fair Value Of Financial Instruments (Tables)

3 Months Ended

Jul. 31, 2015

Fair Value Of Financial Instruments [Abstract]

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

(in thousands)		Common stock warrants
Balance at April 30, 2015	$		195
Change in fair value of common stock warrant liability			(70)
Balance at July 31, 2015	$		125