Summary of Income Tax Provision Computed by Applying Statutory Federal Income Tax Rate to Income (Losses) from Continuing Operations Before Income Taxes (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Schedule of Components of Income Before Income Tax Expense (Benefit) [Line Items]
Tax expense (benefit) computed at statutory rate of 35%	$ 6,850,000	$ 5,781,000	$ (982,000)
Change in valuation allowance	1,265,000		(19,000)
State income tax expense (benefit), net of federal tax	1,486,000	433,000	(284,000)
Foreign losses	(987,000)
Transaction costs		(1,353,000)	1,353,000
Other	476,000	542,000	371,000
Income tax expense	$ 9,090,000	$ 5,403,000	$ 439,000