Accrued Expenses (Details) (USD $)	Sep. 30, 2012	Sep. 30, 2011
Accrued expenses
Payroll and related accruals	$ 1,650,000	$ 1,509,000
Warranty and related accruals	524,000	727,000
Professional fees	286,000	181,000
Other	1,057,000	425,000
Accrued expenses	$ 3,517,000	$ 2,842,000