Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Consolidated Statements of Operations [Abstract]
Net sales	$ 125,106	$ 107,357
Operating expenses:
Cost of goods sold	97,025	80,916
Selling, general and administrative expenses	15,846	13,582
Amortization of intangible assets	2,879	1,917
Loss on disposal or impairment of operating assets	10	87
Total operating expenses	115,760	96,502
Operating income	9,346	10,855
Interest income	(33)	(46)
Interest expense	471	128
Foreign currency exchange loss (gain)	(25)	5
Other income, net	(467)	(470)
Income before income tax provision	9,400	11,238
Income tax provision	2,852	3,789
Net income	$ 6,548	$ 7,449
Net income per share:
Basic	$ 1.23	$ 1.41
Diluted	$ 1.22	$ 1.40
Weighted-average number of common shares:
Basic	5,317	5,271
Diluted	5,380	5,324