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3. CONTRACT ACCOUNTING AND ACCOUNTS RECEIVABLE (Details-Billings in Excess of Cost) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Costs in Excess of Billings on Uncompleted Contracts or Programs [Abstract]
Costs and estimated earnings recognized	$ 511,108	$ 882,716
Less: Billings or cash received	(489,050)	(790,050)
Costs and estimated earnings in excess of billings on uncompleted contracts	22,058	92,666
Billings and/or cash receipts on uncompleted contract	0	15,000
Less: Revenues recognized	0	(9,386)
Billings in excess of costs and estimated earnings on uncompleted contracts	$ 0	$ 5,614

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Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method.

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Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date.

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