Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2012	Jan. 31, 2011
Condensed Consolidated Statements Of Operations [Abstract]
Net sales	$ 119,976	$ 111,443	$ 379,593	$ 328,359
Cost of sales and distribution	105,388	99,279	330,484	291,992
Gross Profit	14,588	12,164	49,109	36,367
Selling and marketing expenses	13,671	16,069	44,155	45,977
General and administrative expenses	6,273	5,421	18,780	17,283
Restructuring charges	10,347	16	10,362	55
Operating Loss	(15,703)	(9,342)	(24,188)	(26,948)
Interest expense	132	141	406	433
Other income	(182)	(174)	(510)	(579)
Loss Before Income Taxes	(15,653)	(9,309)	(24,084)	(26,802)
Income tax benefit	(6,539)	(3,481)	(9,278)	(10,172)
Net Loss	$ (9,114)	$ (5,828)	$ (14,806)	$ (16,630)
Weighted average shares outstanding
Basic	14,361,953	14,263,320	14,330,863	14,241,883
Diluted	14,361,953	14,263,320	14,330,863	14,241,883
Net loss per share
Basic	$ (0.63)	$ (0.41)	$ (1.03)	$ (1.17)
Diluted	$ (0.63)	$ (0.41)	$ (1.03)	$ (1.17)
Cash dividends per share	$ 0.00	$ 0.09	$ 0.09	$ 0.27