Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Oct. 31, 2020
Income Taxes
Deferred tax assets, Compensation and benefit accruals	$ 7,891	$ 8,157
Deferred tax assets, Bad debt and other allowances	1,081	1,574
Deferred tax assets, Capital loss and tax credit carry-forwards	15,191	15,456
Deferred tax assets, Net operating losses (domestic and foreign)	113,733	100,791
Deferred tax assets, Deferred license revenue	1,885	2,093
Deferred tax assets, Accumulated depreciation	12,379	9,759
Deferred tax assets, Grant revenue	609	700
Deferred tax assets, Excess business interest	9,695	5,544
Deferred tax assets Operating lease liabilities	2,211	2,387
Deferred tax assets, Gross	164,675	146,461
Deferred tax assets, Valuation allowance	(160,530)	(142,217)
Deferred tax assets after valuation allowance	4,145	4,244
Deferred tax liability, In process research and development	(2,510)	(2,391)
Deferred tax liability Right of use assets	(1,964)	(2,229)
Deferred Tax Liability, Net	$ (329)	$ (376)