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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Oct. 31, 2019
Oct. 31, 2018
Income Tax Disclosure [Abstract]    
Deferred tax assets, Compensation and benefit accruals $ 7,446 $ 7,767
Deferred tax assets, Bad debt and other allowances 905 426
Deferres tax assets, Capital loss and tax credit carry-forwards 12,645 12,295
Deferred tax assets, Net operating losses (domestic and foreign) 217,430 202,643
Deferred tax assets, Deferred license revenue 4,264 4,765
Deferred tax assets, Inventory valuation allowances 312 238
Deferred tax assets, Accumulated depreciation 9,200 4,374
Deferred tax assets, Grant revenue 798 910
Deferred tax assets, Gross 253,000 233,418
Deferred tax assets, Valuation allowance (250,985) (231,403)
Deferred tax assets after valuation allowance 2,015 2,015
Deferred tax liability, In process research and development (2,321) (2,356)
Deferred Tax Liability, Net $ (306) $ (341)