Business Acquisition (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Pro forma results of operations
Net sales	$ 126,619	$ 129,757
Net income	$ 7,533	$ 9,915
Net income per share (basic)	$ 1.42	$ 1.88
Net income per share (diluted)	$ 1.40	$ 1.86