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Note 11 - Revenue Recognition - Revenue Attributed to United States and All Other Countries (Details) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Net sales	$ 14,863,428	$ 18,957,175	$ 27,750,824	$ 35,707,843
UNITED STATES
Net sales	11,857,559	15,464,981	22,345,906	29,039,382
Non-US [Member]
Net sales	$ 3,005,869	$ 3,492,194	$ 5,404,918	$ 6,668,461

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

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