Schedule II - Valuation and Qualifying Accounts - Rollforward for Allowance for Doubtful Accounts (Details) - USD ($)	12 Months Ended	24 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2019
Allowance for doubtful accounts	$ 612,434	$ 971,772
Bad debt expense	320,270	25,044	$ 25,044
Receivables written off during the periods	(484,265)	(362,244)
Effect of currency translation	49,605	(22,138)
Allowance for doubtful accounts	$ 498,044	$ 612,434	$ 612,434

Amount of allowance for credit loss on accounts receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Amount of direct write-downs of accounts receivable charged against the allowance.

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Amount of gain (loss) from converting allowance reserve for credit loss to currency of reporting entity from amount denominated or measured in a different currency, which decreases (increases) the allowance for loan and lease losses.

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Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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