Stock-Based Compensation (Tables)

9 Months Ended

Jan. 31, 2013

Stock-Based Compensation [Abstract]

Stock-Based Compensation Expense Allocated

	Three Months Ended				Nine Months Ended
	January 31,				January 31,
(in thousands)		2013		2012		2013		2012
Cost of sales and distribution	$	159	$	117	$	467	$	415
Selling and marketing expenses		224		162		654		551
General and administrative expenses		504		494		1,527		1,640
Stock-based compensation expense	$	887	$	773	$	2,648	$	2,606