Consolidated Condensed Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Consolidated Condensed Statements Of Operations [Abstract]
Net sales	$ 34,079	$ 26,804	$ 62,589	$ 48,200
Operating expenses:
Cost of goods sold	26,601	19,878	48,646	36,299
Selling, general and administrative expenses	4,104	3,318	8,073	6,494
Amortization of intangible assets	662	685	1,477	742
Total operating expenses	31,367	23,881	58,196	43,535
Operating income	2,712	2,923	4,393	4,665
Interest income	(3)	(11)	(10)	(33)
Interest expense	134	44	228	64
Foreign currency exchange (gain) loss, net	3	5	(19)	9
Other income, net	(118)	(117)	(235)	(234)
Income before income tax provision	2,696	3,002	4,429	4,859
Income tax provision	972	1,007	1,519	1,658
Net income	$ 1,724	$ 1,995	$ 2,910	$ 3,201
Net income per share
Basic	$ 0.32	$ 0.38	$ 0.55	$ 0.61
Diluted	$ 0.32	$ 0.38	$ 0.55	$ 0.60
Weighted-average number of common shares (basic)	5,315	5,267	5,303	5,263
Weighted-average number of common shares (diluted)	5,336	5,313	5,326	5,302