Summary of Other Current Liabilities (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
Other Current Liabilities [Line Items]
Accrued self-insurance reserves	$ 1,865,000	$ 2,181,000
Accrued profit sharing	1,313,000	963,000
Income and franchise taxes payable	243,000	1,096,000
Accrued insurance premiums	805,000
Other accrued expenses and current liabilities	1,928,000	2,185,000
Total other current liabilities	$ 6,154,000	$ 6,425,000