Accounts receivable, net (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Credit Loss [Abstract]
Accounts receivable	$ 8,816,071	$ 4,242,392
Allowance for doubtful accounts	(2,478,341)	(123,890)	$ (19,386)
Total accounts receivable, net	$ 6,337,730	$ 4,118,502

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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