Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Oct. 31, 2019
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)