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Accounts Receivable (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounts Receivable [Abstract] |
Summary of accounts receivable |
|  |  | 2018 |  |  | 2017 |
| Billed: |  |  |  |  |  |
| Block sales |  | $ | 14,723 |  |  | $ | — |
| Construction services |  |  | 1,619,498 |  |  |  | 2,470,526 |
| Engineering services |  |  | 400,877 |  |  |  | 196,008 |
| Retainage receivable |  |  | 543,417 |  |  |  | 373,576 |
| Other receivable |  |  | 7,706 |  |  |  | — |
| Total gross receivables |  |  | 2,586,221 |  |  |  | 3,040,110 |
| Less: allowance for doubtful accounts (1) |  |  | (839,895 | ) |  |  | (34,235 | )
| Total net receivables |  | $ | 1,746,326 |  |  | $ | 3,005,875 |
| (1) The change in allowance for doubtful accounts is primarily due to unpaid billings on a contract that is currently in dispute. |  |  |  |  |  |  |  |

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- References No definition available. + 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 http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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