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REVENUE - Contract assets and contract liabilities (Details) - USD ($)
Sep. 30, 2023
Mar. 31, 2023
REVENUE    
Contract assets $ 8,096,608 $ 8,947,811
Unbilled    
REVENUE    
Contract assets 20,183,772 19,485,914
Progress Payments    
REVENUE    
Contract assets $ (12,087,164) $ (10,538,103)