XML 86 R58.htm IDEA: XBRL DOCUMENT v3.20.1
Goodwill and Intangible Assets - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Apr. 30, 2020
Apr. 30, 2019
Apr. 30, 2020
Apr. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]        
Goodwill impairment loss $ 0   $ 0  
Amortization expense $ 205,000 $ 89,000 $ 490,000 $ 178,000