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Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2021
Accounting Policies [Abstract] |
Schedule of accounts receivable and allowance for doubtful accounts | ​
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Nine Months Ended September 30, 2021 | ​ | Balance at Beginning of Period | ​ | Charged to Costs and Expenses | ​ | Write-offs | ​ | Balance at End of Period
Allowance for doubtful accounts |  | $ | 9,502 |  | $ | 7,221 |  | $ | (593) |  | $ | 16,130
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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 http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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