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Note 1 - Summary of Significant Accounting Policies - Contract Assets and Liabilities (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Cost incurred $ 3,448,036 $ 3,381,994
Unbilled project deliveries 938,041 454,158
VAT 676,610 542,255
Other receivables 61,873 60,158
Prepayments (2,675,339) (2,947,736)
Deferred Revenue (258,308) (499,146)
Contract with Customer, Asset (Liability), Net 2,190,913 991,682
Contract assets 2,786,063 1,906,510
Contract liabilities (595,150) (914,828)
Contract with Customer, Asset (Liability), Net $ 2,190,913 $ 991,682