Basis of Presentation and Significant Accounting Policies - Computation of Basic and Diluted Weighted Average Shares Used in the Earnings per Share Calculations (Detail)	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Denominator for basic earnings per share - weighted average common shares	3,995,321	3,897,880
Effect of dilutive options (treasury method)
Denominator for diluted earnings per share - adjusted weighted average common shares	3,995,321	3,897,880
Options outstanding during each period, but not included in the computation of diluted earnings per share because they are antidilutive	1,235,988	1,051,911