Income Taxes	3 Months Ended
Jan. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	10. INCOME TAXES The Company calculates its provision for federal and state income taxes based on current tax law. The Tax Cuts and Jobs Act (tax reform) was enacted on December 22, 2017 (“Enactment Date”), and has several key provisions impacting accounting for and reporting of income taxes. The most significant provision reduces the U.S. corporate statutory tax rate from 35% to 21% beginning on January 1, 2018. Although most provisions of tax reform are not effective until 2018, the Company is required to record the effect of a change in tax law as of the Enactment Date on its deferred tax assets. As the Company maintains a full valuation allowance against its deferred tax assets, there is no income tax expense recorded related to this change. As of the Enactment Date, the Company estimates that its deferred tax asset and related valuation allowance were each reduced by approximately $2.2 million. Additionally, the Securities Exchange Commission staff has issued SAB 118, which allows the Company to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. On December 22, 2017, Staff Accounting Bulletin No. 118 (“SAB 118”) was issued to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Act. Because the Company is still in the process of analyzing certain provisions of the Tax Act, the Company has determined that the adjustment to its deferred taxes was a provisional amount as permitted under SAB 118. Due to the Company’s history of losses and uncertainty of future taxable income, a valuation allowance sufficient to fully offset net operating losses and other deferred tax assets has been established. The valuation allowance will be maintained until sufficient positive evidence exists to support a conclusion that a valuation allowance is not necessary. The issuance of Preferred Stock in connection with the Polarity acquisition will likely result in limitations on the utilization of the Company’s net operating loss carryforwards under IRS section 382.

Income Taxes

3 Months Ended

Jan. 31, 2018

10. INCOME TAXES

The Company calculates its provision for federal and state income taxes based on current tax law. The Tax Cuts and Jobs Act (tax reform) was enacted on December 22, 2017 (“Enactment Date”), and has several key provisions impacting accounting for and reporting of income taxes. The most significant provision reduces the U.S. corporate statutory tax rate from 35% to 21% beginning on January 1, 2018. Although most provisions of tax reform are not effective until 2018, the Company is required to record the effect of a change in tax law as of the Enactment Date on its deferred tax assets. As the Company maintains a full valuation allowance against its deferred tax assets, there is no income tax expense recorded related to this change. As of the Enactment Date, the Company estimates that its deferred tax asset and related valuation allowance were each reduced by approximately $2.2 million.

Additionally, the Securities Exchange Commission staff has issued SAB 118, which allows the Company to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. On December 22, 2017, Staff Accounting Bulletin No. 118 (“SAB 118”) was issued to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Act. Because the Company is still in the process of analyzing certain provisions of the Tax Act, the Company has determined that the adjustment to its deferred taxes was a provisional amount as permitted under SAB 118.

Due to the Company’s history of losses and uncertainty of future taxable income, a valuation allowance sufficient to fully offset net operating losses and other deferred tax assets has been established. The valuation allowance will be maintained until sufficient positive evidence exists to support a conclusion that a valuation allowance is not necessary. The issuance of Preferred Stock in connection with the Polarity acquisition will likely result in limitations on the utilization of the Company’s net operating loss carryforwards under IRS section 382.