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Accounts Receivable | 3 Months Ended
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Mar. 31, 2020
Accounts Receivable [Abstract] |
Accounts Receivable |
4. | Accounts Receivable
At March 31, 2020 and December 31, 2019, the Company’s accounts receivable consisted of the following:
|  |  | 2020 |  |  | 2019 |
| Billed: |  |  |  |  |  |
| Construction services |  | $ | 1,282,142 |  |  | $ | 1,321,575 |
| Engineering services |  |  | 45,423 |  |  |  | 14,594 |
| Retainage receivable |  |  | 543,416 |  |  |  | 544,911 |
| Other receivable |  |  | 9,627 |  |  |  | 6,000 |
| Total gross receivables |  |  | 1,880,608 |  |  |  | 1,887,080 |
| Less: allowance for doubtful accounts |  |  | (785,895 | ) |  |  | (785,895 | )
| Total net receivables |  | $ | 1,094,713 |  |  | $ | 1,101,185 |
Receivables are evaluated for collectability and allowances for potential losses are established or maintained on applicable receivables. There was no provision for doubtful accounts, no recoveries collected for doubtful accounts and no write offs for three months ended March 31, 2020. There was no provision for doubtful accounts, $54,000 in recoveries collected for doubtful accounts and no write offs for the year ended December 31, 2019.

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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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