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Note 15 - Income taxes: Schedule of Effective Income Tax Rate Reconciliation (Details) - Singapore	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Singapore income tax rate	17.00%	17.00%	17.00%
Difference from the effect of tax rates in a foreign jurisdiction (PRC)	19.80%	(14.60%)	1.00%
Effect of preferential tax rates	(20.10%)	7.90%	1.20%
Effect of changes in tax rates	(23.50%)	0.00%	0.00%
Tax rebate in Singapore	8.90%	(2.00%)	(0.70%)
Additional R&D deduction	38.10%	(10.10%)	(4.60%)
Change in valuation allowance	(0.50%)	36.40%	0.40%
Permanent differences (1)	(33.40%)	6.90%	3.80%
Effect of true-up on NOL	(74.20%)	0.00%	0.00%
Interest on uncertain tax position	(26.80%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Percent	(94.70%)	41.50%	18.10%

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- Definition

Represents the percentage value of Effective Income Tax Rate Reconciliation Additional Research And Development Deduction, during the indicated time period.

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Represents the percentage value of Effective Income Tax Rate Reconciliation - Changes of Uncertain Tax Position, during the indicated time period.

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Represents the percentage value of Effective Income Tax Rate Reconciliation Impact of Preferential Tax Rate Difference, during the indicated time period.

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Represents the percentage value of Effective Income Tax Rate, Reconciliation of Effect of True-up on NOL, during the indicated time period.

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Represents the percentage value of Effective Income Tax Rate Reconciliation Permanent Differences, during the indicated time period.

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Represents the percentage value of Effective Income Tax Rate Reconciliation Tax Rebate Income, during the indicated time period.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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