ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
ACCRUED EXPENSES, INCOME TAXES PAYABLE AND OTHER CURRENT LIABILITIES [Abstract]
Accrued compensation	$ 11,895	$ 18,532
Goods and services received, not yet invoiced	4,347	3,478
Deferred revenue and customer advances	4,383	3,341
Warranty accrual	347	359
Income taxes payable	1,803	2,843
Taxes, other than income taxes	1,048	1,041
Other	2,932	3,144
Total	$ 26,755	$ 32,738