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Note 4 - Accounts Receivable - Schedule of Receivables (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts	$ (247,783)	$ (328,522)
Accounts receivable, net	3,599,835	4,041,563
Trade Accounts Receivable [Member]
Accounts receivable, gross	2,992,647	3,537,864
Premium [Member]
Accounts receivable, gross	$ 854,971	$ 832,221

X

- Definition

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

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