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Note 1 - Summary of Significant Accounting Policies - Contract Assets and Liabilities (Details) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Cost incurred | $ 4,176,466 | $ 3,860,179
Unbilled project deliveries | 941,767 | 950,105
VAT | 242,831 | 229,006
Other receivables | 107,607 | 45,814
Prepayments | (3,357,497) | (3,363,039)
Deferred Revenue | (63,930) | (118,327)
Contract with Customer, Asset (Liability), Net | 2,047,244 | 1,603,738
Contract assets | 2,587,397 | 2,253,295
Contract liabilities | (540,153) | (649,557)
Contract with Customer, Asset (Liability), Net | $ 2,047,244 | $ 1,603,738

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