Costs and Estimated Earnings on Uncompleted Contracts (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Costs and estimated earnings on uncompleted contracts
Costs incurred on uncompleted contracts	$ 1,084,120	$ 316,722
Provision for loss on uncompleted contracts
Estimated income	160,208	40,488
Cost on uncompleted contracts, net	1,244,328	357,210
Less: billings to date	(1,425,370)	(372,339)
Costs and estimated earnings on uncompleted contracts, net	$ (181,042)	$ (15,129)

Costs incurred on uncompleted contracts.

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- Definition

Estimated income loss on uncompleted contracts.

+ References

No definition available.

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- Definition

Amount billed to customers under long-term contracts or programs but not paid. Excludes amounts due that have been withheld because of retainage provisions in a contract.

+ References

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- Definition

Amount billed to customers under long-term contracts or programs that have been withheld because of retainage provisions in a contract.

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Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings.

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Cumulative provision for contract losses not offset against related costs accumulated on the balance sheet.

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