Net Income Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Numerator:
Net income (in dollars)	$ 1,199,250	$ 602,514	$ 2,211,395	$ 527,167
Denominator:
Denominator for basic net income per share - weighted average shares outstanding	12,146,969	12,003,167	12,092,003	12,049,900
Effect of share-based awards (in shares)	457,130	232,534	390,555	208,502
Denominator for diluted net income per share - weighted average shares outstanding	12,604,099	12,235,701	12,482,558	12,258,402
Basic net income per share (in dollars per share)	$ 0.10	$ 0.05	$ 0.18	$ 0.04
Diluted net income per share (in dollars per share)	$ 0.10	$ 0.05	$ 0.18	$ 0.04
Shares excluded from the calculation of diluted net income per share	65,800	1,083,500
Shares/units that could be potentially dilutive			251,800