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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Oct. 31, 2018 | Oct. 31, 2017
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Income Tax Disclosure [Abstract] |  |
Deferred tax assets, Compensation and benefit accruals | $ 7,767 | $ 11,158
Deferred tax assets, Bad debt and other allowances | 426 | 605
Deferres tax assets, Capital loss and tax credit carry-forwards | 12,295 | 13,398
Deferred tax assets, Net operating losses (domestic and foreign) | 202,643 | 282,022
Deferred tax assets, Deferred license revenue | 4,765 | 7,850
Deferred tax assets, Inventory valuation allowances | 238 | 111
Deferred tax assets, Accumulated depreciation | 4,374 | 5,095
Deferred tax assets, Grant revenue | 910 | 1,522
Deferred tax assets, Gross | 233,418 | 321,761
Deferred tax assets, Valuation allowance | (231,403) | (321,761)
Deferred tax assets after valuation allowance | 2,015 | 0
Deferred tax liability, In process research and development | (2,356) | (3,377)
Deferred Tax Liability, Net | $ (341) | $ (3,377)

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