Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Net sales	$ 119,654	$ 116,001	$ 102,900
Cost of goods sold	93,729	87,986	81,094
Gross margin	25,925	28,015	21,806
Selling, general and administrative expenses	15,680	12,262	9,906
Amortization of intangible assets	2,161	2,076	2,879
(Gain) on disposal or impairment of operating assets	(3)	(89)	0
Operating income	8,087	13,766	9,021
Interest income	(17)	(24)	(27)
Interest expense	201	342	471
Foreign currency exchange (gain) loss, net	(20)	23	(16)
Other income, net	(433)	(421)	(575)
Income from continuing operations before income tax provision	8,356	13,846	9,168
Income tax provision	2,753	4,088	2,861
Income from continuing operations	5,603	9,758	6,307
Income (loss) from discontinued operations, net of tax	(580)	476	241
Net income	$ 5,023	$ 10,234	$ 6,548
Earnings Per Share From Continuing Operations [Abstract]
Basic (in dollars per share)	$ 1.04	$ 1.82	$ 1.19
Diluted (in dollars per share)	$ 1.03	$ 1.81	$ 1.18
Earnings Per Share From Discontinued Operations [Abstract]
Basic (in dollars per share)	$ (0.11)	$ 0.09	$ 0.04
Diluted (in dollars per share)	$ (0.11)	$ 0.09	$ 0.04
Earnings Per Share [Abstract]
Basic (in dollars per share)	$ 0.93	$ 1.91	$ 1.23
Diluted (in dollars per share)	$ 0.92	$ 1.90	$ 1.22
Weighted Average Number of Common Shares [Abstract]
Weighted-average number of common shares (basic shares)	5,402	5,363	5,317
Weighted-average number of common shares (diluted shares)	5,424	5,401	5,380