Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Net income	$ 1,230	$ 724
Denominator for basic net income per common share — weighted average shares outstanding	26,188,000	25,639,000
Effect of dilutive securities [Abstract]
Employee stock options and employee stock purchase plan	246,000	504,000
Denominator for diluted net income per common share — adjusted weighted average shares	26,434,000	26,143,000
Net income per common share, basic	$ 0.05	$ 0.03
Net income per common share, diluted	$ 0.05	$ 0.03
Antidilutive securities excluded from computation of earnings per share	4,278,823	1,810,830