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Accounts receivable consists of trade receivables as follows: (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Billed receivables	$ 5,226,468	$ 7,260,457
Less: allowance for doubtful accounts	(263,562)	(230,855)
Total accounts receivable, net	$ 4,962,906	$ 7,029,602

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, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

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

+ References

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