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v3.22.4

Accounts receivable | 12 Months Ended
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Dec. 31, 2021
Accounts receivable |
Accounts receivable | Note 5 – Accounts Receivable Accounts receivable consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2021 | ​ | 2020
Accounts receivable | ​ | $ | 48,680,634 | ​ | $ | 38,110,487
Allowance for doubtful accounts | ​ |  | (3,717,708) | ​ |  | (3,699,890)
Accounts receivable, net | ​ | $ | 44,962,926 | ​ | $ | 34,410,597
​ The movement of allowance for doubtful accounts are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ | ​ | 2021 | ​ | 2020
Balance at beginning of period | ​ | $ | 3,699,890 | ​ | $ | 5,731,281
Change of allowance for doubtful accounts | ​ |  | (53,436) | ​ |  | (895,043)
Write off | ​ |  | (15,631) | ​ |  | (1,523,489)
Translation adjustments | ​ |  | 86,885 | ​ |  | 387,141
Balance at end of period | ​ | $ | 3,717,708 | ​ | $ | 3,699,890
​

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- Definition The entire disclosure for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2196816 + Details
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