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CONTRACT ACCOUNTING (Schedule of billings in excess of costs and estimated earnings) (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Contractors [Abstract]      
Billings and/or cash receipts on uncompleted contracts $ 3,283 $ 35,665 $ 8,563,241
Less: Costs and estimated earnings recognized   (27,004) (6,314,412)
Contract Liabilities $ 3,283 $ 8,661 $ 2,248,829