Note 7 - Fair Values of Assets and Liabilities - Fair Values of Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)	Jan. 31, 2018	Oct. 31, 2017
Fair Value, Inputs, Level 1 [Member]
Unrealized gain (loss) on derivative	$ 0
Fair Value, Inputs, Level 2 [Member]
Unrealized gain (loss) on derivative	5,098	3,787
Fair Value, Inputs, Level 3 [Member]
Unrealized gain (loss) on derivative	$ 0