Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2011	Oct. 31, 2010
Condensed Consolidated Statements Of Operations [Abstract]
Net sales	$ 128,418	$ 107,613	$ 259,617	$ 216,916
Cost of sales and distribution	112,304	97,797	225,096	192,713
Gross Profit	16,114	9,816	34,521	24,203
Selling and marketing expenses	14,508	15,805	30,484	29,908
General and administrative expenses	6,166	6,040	12,507	11,862
Restructuring charges	0	16	15	39
Operating Loss	(4,560)	(12,045)	(8,485)	(17,606)
Interest expense	137	144	274	292
Other income	(174)	(231)	(328)	(405)
Loss Before Income Taxes	(4,523)	(11,958)	(8,431)	(17,493)
Income tax benefit	(1,547)	(4,574)	(2,739)	(6,691)
Net Loss	$ (2,976)	$ (7,384)	$ (5,692)	$ (10,802)
Weighted average shares outstanding
Basic	14,330,954	14,240,178	14,315,318	14,231,165
Diluted	14,330,954	14,240,178	14,315,318	14,231,165
Net loss per share
Basic	$ (0.21)	$ (0.52)	$ (0.40)	$ (0.76)
Diluted	$ (0.21)	$ (0.52)	$ (0.40)	$ (0.76)
Cash dividends per share	$ 0.00	$ 0.09	$ 0.09	$ 0.18