Note 1 - Summary of Significant Accounting Policies - Contract Assets and Liabilities (Details) - USD ($)	6 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Cost incurred	$ 4,305,503	$ 3,960,199
Unbilled project deliveries	1,805,884	1,971,106
VAT	397,949	862,368
Other receivables	114,036	58,397
Prepayments	(2,330,373)	(1,732,231)
Deferred Revenue	(1,093,114)	(876,286)
Contract with Customer, Asset (Liability), Net	3,199,885	4,243,553
Contract assets	4,523,130	5,664,929
Contract liabilities	(1,323,245)	(1,421,376)
Contract with Customer, Asset (Liability), Net	$ 3,199,885	$ 4,243,553

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

No definition available.

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- Definition

The amount of costs incurred in a contract with customer.

+ References

No definition available.

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- Definition

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.

+ References

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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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- Definition

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

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- Definition

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.

+ References

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