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Borrowings
12 Months Ended
Sep. 30, 2012
Debt Disclosure [Abstract]  
Borrowings
Borrowings
At September 30, 2012, the Company had short-term lines of credit with various financial institutions in Taiwan whereby it could borrow in aggregate up to approximately $20.6 million denominated in a combination of U.S. and New Taiwan dollars. As of September 30, 2012 and September 30, 2011, the Company had no borrowings outstanding under these lines of credit. These lines of credit expire at various times through August 2013. There were no assets pledged as collateral for short-term debt or notes. Commitment fees relating to these lines are not material.