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v3.23.1

Contract Assets and Contract Liabilities (Details 1) - USD ($) | Mar. 31, 2023 | Dec. 31, 2022
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Costs and estimated earnings amounts on uncompleted contracts included in balance sheets |  |
Contract assets | $ 900,717 | $ 36,384
Contract liabilities | (344,129) | (437,271)
Net contract liabilities | $ 556,588 | $ (400,887)

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