Retirement Benefits - Additional Information (Detail) (USD $)	12 Months Ended
Sep. 30, 2014	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]
Retirement benefits expense under the provisions of the plan	$ 156,000	$ 148,000
Company contributed to employee pension fund		7,000
Maximum hours per week considered for contribution	40 hours
Other obligations regarding pension fund	$ 0

- Definition

The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period).

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