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Note 1 - Summary of Significant Accounting Policies - Contract Assets and Liabilities (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Cost incurred	$ 3,980,616	$ 3,381,994
Unbilled project deliveries	282,135	454,158
VAT	413,204	542,255
Other receivables	324,714	60,158
Prepayments	(2,912,111)	(2,947,736)
Deferred Revenue	(343,273)	(499,146)
Contract with Customer, Asset (Liability), Net	1,745,284	991,682
Contract assets	2,437,924	1,906,510
Contract liabilities	(692,640)	(914,828)
Contract with Customer, Asset (Liability), Net	$ 1,745,284	$ 991,682

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- Definition

The amount of contract with customer classified as assets, net of liabilities.

+ References

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The amount of costs incurred in a contract with customer.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price.

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Amount due from parties in nontrade transactions, classified as other.

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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Carrying amount as of the balance sheet date of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities.

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