Stock Compensation - Summary of Changes in Common Stock Options (Detail) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options shares, Beginning balance	2,018,476	2,303,706
Common stock options shares, Ending balance	1,874,551	2,018,476
Common stock options shares, Granted	65,500	215,000
Weighted Average Exercise Price, Ending balance	$ 5.21	$ 5.11
Common stock options shares, Exercised	(163,925)	(365,705)
Common stock options shares, Surrendered	(45,500)	(134,525)
Weighted Average Exercise Price, Beginning balance	$ 5.11	$ 4.83
Weighted Average Exercise Price, Granted	$ 8.29	$ 6.26
Weighted Average Exercise Price, Exercised	$ 5.01	$ 3.95
Weighted Average Exercise Price, Surrendered	$ 6.13	$ 5.17