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Accounts Receivable (Tables) | 6 Months Ended
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Jun. 30, 2022
Accounts receivable |
Schedule of accounts receivable | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, |  | December 31,
​ | ​ | 2022 | ​ | 2021
Accounts receivable | ​ | $ | 50,157,127 | ​ | $ | 48,680,634
Allowance for doubtful accounts | ​ |  | (3,145,561) | ​ |  | (3,717,708)
Accounts receivable, net | ​ | $ | 47,011,566 | ​ | $ | 44,962,926
Accounts receivable |
Accounts receivable |
Schedule of movement of allowance for doubtful accounts | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2022 |  | 2021
Balance at beginning of period | ​ | $ | 3,717,708 | ​ | $ | 3,699,890
Change of allowance for doubtful accounts | ​ |  | (405,198) | ​ |  | (53,436)
Write off | ​ | ​ | — | ​ | ​ | (15,631)
Translation adjustments | ​ |  | (166,949) | ​ |  | 86,885
Balance at end of period | ​ | $ | 3,145,561 | ​ | $ | 3,717,708

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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