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Note 8 - Net Income (Loss) Per Share - Components of Reconciliation of Numerators and Denominators Net Loss Per Share (Details) - USD ($)	3 Months Ended						9 Months Ended
	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Net income (loss) (numerator)	$ (1,085,294)	$ (617,425)	$ (3,310,020)	$ 438,353	$ 1,390,865	$ (410,135)	$ (5,012,739)	$ 1,419,083
Shares (denominator) (in shares)	7,319,274			7,696,068			7,409,465	7,559,340
Basic and diluted net income (loss) per share (in dollars per share)	$ (0.15)			$ 0.06			$ (0.68)	$ 0.19

X

- Definition

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

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X

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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