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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