Condensed Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Condensed Consolidated Statements Of Income [Abstract]
Net sales	$ 169,033	$ 151,346	$ 537,660	$ 459,358
Cost of sales and distribution	143,032	127,839	445,670	389,014
Gross Profit	26,001	23,507	91,990	70,344
Selling and marketing expenses	14,287	13,083	44,638	42,576
General and administrative expenses	6,564	6,714	22,555	18,977
Restructuring charges, net	48	118	161	979
Insurance proceeds	0	0	(94)	(399)
Operating Income	5,102	3,592	24,730	8,211
Interest expense	182	157	554	474
Other income	(33)	(41)	(90)	(125)
Income Before Income Taxes	4,953	3,476	24,266	7,862
Income tax expense	2,052	1,419	9,439	3,294
Net Income	$ 2,901	$ 2,057	$ 14,827	$ 4,568
Weighted Average Shares Outstanding
Basic	15,475,683	14,581,573	15,218,558	14,498,483
Diluted	15,827,666	14,904,524	15,595,342	14,719,441
Net earnings per share
Basic	$ 0.19	$ 0.14	$ 0.97	$ 0.32
Diluted	$ 0.18	$ 0.14	$ 0.95	$ 0.31