EQUITY INCENTIVE PLAN - Stock option activity (Details) - Employee Stock Option	6 Months Ended
	Apr. 30, 2020 $ / shares shares
Stock Options
Outstanding at October 31, 2019 | shares	37,045
Options granted | shares	0
Options exercised | shares	0
Options cancelled | shares	0
Outstanding at April 30, 2020 | shares	37,045
Weighted Average Exercise Price
Outstanding at October 31, 2019 | $ / shares	$ 21.69
Options granted | $ / shares	0.00
Options exercised | $ / shares	0.00
Options cancelled | $ / shares	0.00
Outstanding at April 30, 2020 | $ / shares	$ 21.69