Earnings per Share (Tables) - Earnings per share computations (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share [Abstract]
Weighted average common shares outstanding during the period - shares used for basic earnings per common share	9,527	9,353	9,481	9,321
Common shares issuable under share based payment plans which are potentially dilutive	72	118	84	125
Common shares used for diluted earnings per common share	9,599	9,471	9,565	9,446
Net income	$ 2,271	$ 1,643	$ 5,394	$ 3,767
Basic	$ 0.24	$ 0.18	$ 0.57	$ 0.40
Diluted	$ 0.24	$ 0.17	$ 0.56	$ 0.40