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CONTRACT ASSETS AND CONTRACT LIABILITIES (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Contract assets $ 120,749,918 $ 113,333,491
Contract liabilities (3,496,449) (3,805,106)
Net contract assets 117,253,469 109,528,385
US Government [Member]    
Contract assets 51,201,427 48,358,481
Contract liabilities (3,468,415) (3,780,866)
Net contract assets 47,733,012 44,577,615
Commercial [Member]    
Contract assets 69,548,491 64,975,010
Contract liabilities (28,034) (24,240)
Net contract assets $ 69,520,457 $ 64,950,770