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REVENUE - Contract assets and contract liabilities (Details) - USD ($) | Dec. 31, 2022 | Mar. 31, 2022
--- | --- | ---
REVENUE |  |
Contract assets | $ 9,356,242 | $ 8,350,231
Unbilled |  |
REVENUE |  |
Contract assets | 18,824,537 | 14,216,187
Progress payments |  |
REVENUE |  |
Contract assets | $ (9,468,295) | $ (5,865,956)

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