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Accounts Receivable | 9 Months Ended
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Sep. 30, 2021
Accounts Receivable [Abstract] |
Accounts Receivable |
4. | Accounts Receivable
At September 30, 2021 and December 31, 2020, the Company’s accounts receivable consisted of the following:
|  |  | 2021 |  |  | 2020 |
| Billed: |  |  |  |  |  |
| Construction services |  | $ | 3,066,890 |  |  | $ | 1,391,555 |
| Engineering services |  |  | 34,919 |  |  |  | 86,264 |
| Medical revenue |  |  | 408,619 |  |  |  | 1,157,819 |
| Retainage receivable |  |  | 615,136 |  |  |  | 615,136 |
| Other receivable |  |  | 398,168 |  |  |  | 180,748 |
| Total gross receivables |  |  | 4,523,732 |  |  |  | 3,431,522 |
| Less: allowance for credit losses |  |  | (957,116 | ) |  |  | (795,914 | )
| Total net receivables |  | $ | 3,566,616 |  |  | $ | 2,635,608 |
Receivables are evaluated for collectability and allowances for potential losses are established or maintained on applicable receivables. The allowance for credit losses was $957,116 and $795,914 as of September 30, 2021 and December 31, 2020, respectively. There was a provision of $161,202 for credit losses, no recoveries collected for credit losses and no write offs during the nine months ended September 30, 2021.There was a provision for credit losses of $10,018, and no write offs for the year ended December 31, 2020.

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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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