Note 5 - Summary of Quarterly Results (Unaudited) (Detail) - Summary of quarterly results: (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Net sales	$ 186,337	$ 151,686
Gross profit	45,644	17,701	13,292
Net (loss) income	22,852	(3,574)	(6,339)
Basic and diluted income (loss) per share (in Dollars per share)		$ (0.10)
Basic income per share (in Dollars per share)	$ 0.67	$ (0.10)	$ (0.18)
Diluted income per share (in Dollars per share)	$ 0.66	$ (0.10)	$ (0.18)
First Quarter [Member]
Net sales	47,046	32,862
Gross profit	13,178	4,074
Net (loss) income	9,703	(1,561)
Basic and diluted income (loss) per share (in Dollars per share)		$ (0.05)
Basic income per share (in Dollars per share)	$ 0.28
Diluted income per share (in Dollars per share)	$ 0.28
Second Quarter [Member]
Net sales	47,014	37,099
Gross profit	10,968	2,447
Net (loss) income	3,338	(5,107)
Basic and diluted income (loss) per share (in Dollars per share)		$ 0.15
Basic income per share (in Dollars per share)	$ 0.10
Diluted income per share (in Dollars per share)	$ 0.10
Third Quarter [Member]
Net sales	48,078	38,593
Gross profit	11,278	4,452
Net (loss) income	5,566	(1,461)
Basic and diluted income (loss) per share (in Dollars per share)		$ (0.04)
Basic income per share (in Dollars per share)	$ 0.16
Diluted income per share (in Dollars per share)	$ 0.16
Fourth Quarter [Member]
Net sales	44,199	43,132
Gross profit	10,220	6,728
Net (loss) income	$ 4,245	$ 4,555
Basic and diluted income (loss) per share (in Dollars per share)		$ 0.14
Basic income per share (in Dollars per share)	$ 0.13
Diluted income per share (in Dollars per share)	$ 0.12