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Business Combinations	12 Months Ended
Business Combinations	Sep. 30, 2017
Business Combinations [Abstract]
Business Combinations	Business Combinations There were no acquisitions incurred during fiscal 2017. In fiscal 2016, we acquired 100% of the equity of QuadMetrics 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. In fiscal 2015, we acquired 100% of the equity of TONBELLER for $59.6 million in cash. We recorded $14.9 million of intangible assets, which are being amortized using the straight-line method over a weighted average useful life of approximately 4.9 years. The goodwill of $46.1 million was allocated to our Applications segment and was not deductible for tax purposes.