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Note 5 - Accounts Receivable (Details Textual) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, after Allowance for Credit Loss, Current, Total	$ 6,560,928	$ 6,290,412
Accounts Receivable, Allowance for Credit Loss, Current	214,000	214,000
North American Credit Card Processing [Member]
Accounts Receivable, after Allowance for Credit Loss, Current, Total	68,000	74,000
Non-US [Member]
Accounts Receivable, after Allowance for Credit Loss, Current, Total	$ 6,200,000	$ 6,200,000

X

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

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- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References

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