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Income Taxes	3 Months Ended
	Jan. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 15.  Income Taxes The Company recorded an income tax benefit totaling $3.0 million for the three months ended January 31, 2018 compared to income tax expense of $0.1 million for the three months ended January 31, 2017.  The income tax benefit for the three months ended January 31, 2018 related to the Tax Cuts and Jobs Act (the “Act”) that was enacted on December 22, 2017. The Act reduced the U.S. federal tax rate from 34% to 21% effective January 1, 2018 which resulted in a deferred tax benefit of $1.0 million related to a reduction of the Company’s deferred tax liability for in process research and development (“IPR&D”).  The Act also established an unlimited carryforward period for the net operating loss (“NOL”) the Company anticipates generating in fiscal year 2018.  This provision of the Act resulted in a reduction of the valuation allowance attributable to deferred tax assets at the enactment date by $2.0 million based on the indefinite life of the resulting NOL as well as the deferred tax liability for IPR&D.

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- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

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