Quarterly report pursuant to Section 13 or 15(d)

REVENUE (Schedule of Contract Assets on Uncompleted Contracts) (Details)

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REVENUE (Schedule of Contract Assets on Uncompleted Contracts) (Details) - USD ($)
Sep. 30, 2021
Dec. 31, 2020
Revenue    
Costs and estimated earnings recognized $ 2,012,553 $ 4,152,850
Less: Billings or cash received (1,762,683) (4,050,392)
Contract assets $ 249,870 $ 102,458