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2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Gross accounts receivable	$ 9,376,937	$ 4,346,810
Allowance for doubtful accounts	(173,603)	(276,234)
Total accounts receivable, net	$ 9,203,334	$ 4,070,576

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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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