Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Debt Instrument [Line Items]
Non current maturities	$ 10,550	$ 21,683
Less-current maturities	4,356	2,000
Total long-term debt	6,194	19,683
Revolving credit agreement
Debt Instrument [Line Items]
Non current maturities	694	11,338
Term loan
Debt Instrument [Line Items]
Non current maturities	7,500	8,000
Promissory Note
Debt Instrument [Line Items]
Non current maturities	$ 2,356	$ 2,345