Summary of Notes Payable and Obligations under Capital Leases (Detail) (USD $)	Jun. 30, 2013	Sep. 30, 2012
Line of Credit Facility [Line Items]
Total	$ 15,449,000	$ 20,310,000
Current maturities of notes payable and obligations under capital leases	(10,614,000)	(9,131,000)
Notes payable and obligations under capital leases less current maturities	4,835,000	11,179,000
Term Note
Line of Credit Facility [Line Items]
Total	6,168,000	10,281,000
Second Term Note
Line of Credit Facility [Line Items]
Total	6,429,000	8,821,000
Third Term Note
Line of Credit Facility [Line Items]
Total	880,000
Obligations under capital leases
Line of Credit Facility [Line Items]
Total	$ 1,972,000	$ 1,208,000