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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Oct. 31, 2020 | Oct. 31, 2019
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Income Tax Disclosure [Abstract] |  |
Deferred tax assets, Compensation and benefit accruals | $ 8,157 | $ 7,446
Deferred tax assets, Bad debt and other allowances | 1,458 | 905
Deferres tax assets, Capital loss and tax credit carry-forwards | 15,456 | 12,645
Deferred tax assets, Net operating losses (domestic and foreign) | 100,791 | 217,430
Deferred tax assets, Deferred license revenue | 2,093 | 4,264
Deferred tax assets, Inventory valuation allowances | 116 | 312
Deferred tax assets, Accumulated depreciation | 9,759 | 9,200
Deferred tax assets, Grant revenue | 700 | 798
Deferred tax assets, Excess business interest | 5,544 |
Deferred tax aasets Operating lease liabilities | 2,387 |
Deferred tax assets, Gross | 146,461 | 253,000
Deferred tax assets, Valuation allowance | (142,217) | (250,985)
Deferred tax assets after valuation allowance | 4,244 | 2,015
Deferred tax liability, In process research and development | (2,391) | (2,321)
Deferred tax liability Right of use assets | (2,229) |
Deferred Tax Liability, Net | $ (376) | $ (306)

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