Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]
Net income	$ 738	$ 1,000	$ 1,426	$ 2,230
Denominator for basic net income per common share — weighted average shares outstanding	25,644,000	26,138,000	25,680,000	26,163,000
Effect of dilutive securities:
Stock options and restricted stock units	500,000	338,000	509,000	311,000
Denominator for diluted net income per common share — adjusted weighted average shares	26,144,000	26,476,000	26,189,000	26,474,000
Net income per common share, basic (USD per share)	$ 0.03	$ 0.04	$ 0.06	$ 0.09
Net income per common share, diluted (USD per share)	$ 0.03	$ 0.04	$ 0.05	$ 0.08
Antidilutive securities excluded from computation of earnings per share	3,347,082	3,127,682	2,627,905	3,127,682