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Pro Forma Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Mar. 31, 2012
Business Acquisition, Pro Forma Information [Line Items]
Net sales	$ 56,383
Net income	$ 2,932
Net income per share (basic)	$ 0.55
Net income per share (diluted)	$ 0.55

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References+ Details

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References+ Details