Stock Based Compensation - Plans - (Details)	Oct. 31, 2020 shares
Authorized And Available For Grant [Line Items]
Options And/Or Restrcited Stock Initially Authorized	6,225,000
Options And Or Restricted Stock Available For Grant	3,951,558
2013 Plan
Authorized And Available For Grant [Line Items]
Options And/Or Restrcited Stock Initially Authorized	1,500,000
Options And Or Restricted Stock Available For Grant	0
2018 Plan
Authorized And Available For Grant [Line Items]
Options And/Or Restrcited Stock Initially Authorized	4,725,000
Options And Or Restricted Stock Available For Grant	3,951,558