Basis of Presentation and Significant Accounting Policies - Summary of Status of Company's Non-Vested Shares (Detail) (USD $)	3 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding Beginning Balance	997,045
Shares, Granted	249,900
Options, Forfeited	(6,133)
Options, Outstanding Ending Balance	1,235,988
Weighted-Average Grant Date Fair Value, Granted	$ 3.38
Non Vested Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding Beginning Balance	430,605
Shares, Granted	249,900
Shares, Vested	(149,983)
Options, Forfeited	(2,635)
Options, Outstanding Ending Balance	527,887
Weighted-Average Grant Date Fair Value, Non-vested Beginning Balance	$ 3.28
Weighted-Average Grant Date Fair Value, Granted	$ 3.38
Weighted-Average Grant Date Fair Value, Vested	$ 3.52
Weighted-Average Grant Date Fair Value, Forfeited	$ 3.72
Weighted-Average Grant Date Fair Value, Non-vested Ending Balance	$ 3.26