Business Acquisition (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Pro forma results of operations
Net sales	$ 33,694	$ 95,070	$ 93,999
Net income	$ 2,602	$ 6,208	$ 6,580
Net income per share (basic)	$ 0.49	$ 1.17	$ 1.25
Net income per share (diluted)	$ 0.49	$ 1.16	$ 1.25