Quarterly report pursuant to Section 13 or 15(d)

Costs and Estimated Earnings on Contracts (Details 1)

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Costs and Estimated Earnings on Contracts (Details 1) - USD ($)
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Costs and Estimated Earnings on Contracts [Abstract]      
Costs incurred on uncompleted contracts $ 3,589,945   $ 2,737,277
Estimated earnings on uncompleted contracts 1,040,048   1,418,255
Revenues earned on uncompleted contracts 4,629,993   4,155,532
Billings to date 4,078,991   2,934,518
Total Net Amount 551,002   1,221,014
Amount shown as cost and estimated earnings in excess of billings on uncompleted contracts 980,887 $ 687,791 1,402,439
Amount shown as billings in excess of costs and estimated earnings on uncompleted contracts (429,886) $ (218,864) (181,425)
Total Net Amount $ 551,002   $ 1,221,014