Income Taxes - Schedule of Reconciliation of Federal Statutory Income Tax Rate To Effective Income Tax Rate (Details)	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Income Taxes
Statutory federal income tax rate	(21.00%)	(21.00%)	(21.00%)
State taxes, net of Federal benefits	(5.20%)	(1.10%)	(2.90%)
Foreign withholding tax	0.20%		0.10%
Net operating loss expiration, impairment and true-ups	3.60%	129.20%	(1.30%)
Nondeductible expenditures	1.90%	1.40%	0.20%
Change in tax rates	(1.30%)	(0.60%)	(0.10%)
Fair value adjustment on warrants	3.30%	8.70%
Other, net		1.10%	(0.30%)
Deferred only adjustment	0.80%	4.40%
Valuation allowance	17.90%	(122.10%)	25.40%
Effective income tax rate	0.20%		0.10%