Accrued Expenses and Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Accrued Expenses and Other Current Liabilities [Abstract]
Employee bonuses	$ 5,736	$ 4,167
Product warranty	2,308	2,123
Compensated absences	1,266	1,206
Legal and professional fees	502	475
Payroll	674	198
Property taxes	1,386	1,215
Medical claims	470	372
Other	1,636	1,628
Accrued expenses and other current liabilities	$ 13,978	$ 11,384