Stock-Based Compensation (Tables)

6 Months Ended

Oct. 31, 2016

Share-based Compensation [Abstract]

Stock-Based Compensation Expense Allocated

For the three- and six-month periods ended October 31, 2016 and 2015, stock-based compensation expense was allocated as follows: 

	Three Months Ended   October 31,				Six Months Ended   October 31,
(in thousands)	2016		2015		2016		2015
Cost of sales and distribution	$	158	$	141	$	308	$	299
Selling and marketing expenses	250		250		501		530
General and administrative expenses	395		441		840		966
Stock-based compensation expense	$	803	$	832	$	1,649	$	1,795