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Business Combinations	12 Months Ended
Business Combinations	Sep. 30, 2018
Business Combinations [Abstract]
Business Combinations	Business Combinations There were no acquisitions incurred during fiscal 2018 and 2017. In fiscal 2016, we acquired 100% of the equity of QuadMetrics, Inc. for $5.7 million in cash. We recorded $2.0 million of intangible assets, which are being amortized using the straight-line method over a weighted average useful life of approximately 4.0 years. We allocated $3.9 million of goodwill to our Applications segment that was not deductible for tax purposes.