Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts and Billings in Excess of Costs and Estimated Earnings on Uncompleted Contracts (Summary Of Contract In Process) (Details) - USD ($)	Dec. 31, 2016	Mar. 31, 2016
Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts and Billings in Excess of Costs and Estimated Earnings on Uncompleted Contracts [Abstract]
Costs incurred on uncompleted contracts	$ 502,701	$ 2,607,764
Estimated earnings	331,969	717,771
Contracts in process, Gross	834,670	3,325,535
Less billings to date	(804,753)	(3,265,239)
Contracts in process	29,917	60,296
Costs and estimated earnings in excess of billings on uncompleted contracts	$ 29,917	$ 60,296