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COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS (Details) - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Costs incurred on uncompleted Contracts $ 539,217,579 $ 494,901,886
Estimated earnings 106,541,378 97,984,749
Sub-total 645,758,957 592,886,635
Less billings to date 537,794,056 493,423,446
Totals 107,964,901 99,463,189
US Government [Member]    
Costs incurred on uncompleted Contracts 368,164,864 341,003,461
Estimated earnings 34,663,617 39,638,231
Sub-total 402,828,481 380,641,692
Less billings to date 357,402,993 331,277,942
Totals 45,425,488 49,363,750
Commercial [Member]    
Costs incurred on uncompleted Contracts 171,052,715 153,898,425
Estimated earnings 71,877,761 58,346,518
Sub-total 242,930,476 212,244,943
Less billings to date 180,391,063 162,145,504
Totals $ 62,539,413 $ 50,099,439